diff --git a/elements/10_electric/10_allpole/100_folio_referencing/qet_directory b/elements/10_electric/10_allpole/100_folio_referencing/qet_directory
index 3ed0f3395..e1b451666 100644
--- a/elements/10_electric/10_allpole/100_folio_referencing/qet_directory
+++ b/elements/10_electric/10_allpole/100_folio_referencing/qet_directory
@@ -12,5 +12,6 @@
         <name lang="es">Referencias</name>
         <name lang="nl">Referenties</name>
         <name lang="da">Ark henvisninger</name>
+        <name lang="ja">フォリオ参照</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/110_network_supplies/qet_directory b/elements/10_electric/10_allpole/110_network_supplies/qet_directory
index dd41b1901..acbd2e7b2 100644
--- a/elements/10_electric/10_allpole/110_network_supplies/qet_directory
+++ b/elements/10_electric/10_allpole/110_network_supplies/qet_directory
@@ -11,5 +11,6 @@
         <name lang="cs">Síťové zdroje</name>
 		<name lang="es">Fuentes de red</name>
         <name lang="da">Netværkskilder</name>
+        <name lang="ja">電源網</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/114_connections/qet_directory b/elements/10_electric/10_allpole/114_connections/qet_directory
index 2b93ba959..3a4852ecf 100644
--- a/elements/10_electric/10_allpole/114_connections/qet_directory
+++ b/elements/10_electric/10_allpole/114_connections/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Verbindingen</name>
 		<name lang="es">Conexiones</name>
         <name lang="da">Forbindelser</name>
+        <name lang="ja">接続</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/120_cables&wiring/qet_directory b/elements/10_electric/10_allpole/120_cables&wiring/qet_directory
index 33799af5f..0d85feaea 100644
--- a/elements/10_electric/10_allpole/120_cables&wiring/qet_directory
+++ b/elements/10_electric/10_allpole/120_cables&wiring/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Kabels en draden</name>
         <name lang="cs">Kabely a drátové propojení</name>
         <name lang="da">Kabler og ledninger</name>
+        <name lang="ja">ケーブルと配線</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/130_terminals&terminal_strips/qet_directory b/elements/10_electric/10_allpole/130_terminals&terminal_strips/qet_directory
index e172a3467..9e56fa9c2 100644
--- a/elements/10_electric/10_allpole/130_terminals&terminal_strips/qet_directory
+++ b/elements/10_electric/10_allpole/130_terminals&terminal_strips/qet_directory
@@ -13,5 +13,6 @@
         <name lang="el">Ακροδέκτες και σειρές ακροδεκτών</name>
         <name lang="nl">Klemmenlijst</name>
         <name lang="da">Klemmer og klemmerækker</name>
+        <name lang="ja">端子と端子台</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/140_connectors&plugs/qet_directory b/elements/10_electric/10_allpole/140_connectors&plugs/qet_directory
index 181e00cf1..22a32a287 100644
--- a/elements/10_electric/10_allpole/140_connectors&plugs/qet_directory
+++ b/elements/10_electric/10_allpole/140_connectors&plugs/qet_directory
@@ -10,5 +10,6 @@
         <name lang="el">Σύνδεσμοι και πρίζες</name>
         <name lang="nl">Connectoren en stekkers</name>
         <name lang="da">Stik</name>
+        <name lang="ja">コネクタとプラグ</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/200_fuses&protective_gears/qet_directory b/elements/10_electric/10_allpole/200_fuses&protective_gears/qet_directory
index 2edeb819f..9e05d2e94 100644
--- a/elements/10_electric/10_allpole/200_fuses&protective_gears/qet_directory
+++ b/elements/10_electric/10_allpole/200_fuses&protective_gears/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Zekeringen en beveiligingen</name>
         <name lang="cs">Tavné pojistky a ochrany</name>
         <name lang="da">Sikringer og beskyttelsesudstyr</name>
+        <name lang="ja">ヒューズと保護装置</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/310_relays_contactors&contacts/qet_directory b/elements/10_electric/10_allpole/310_relays_contactors&contacts/qet_directory
index fac4ddc3b..639f007b7 100644
--- a/elements/10_electric/10_allpole/310_relays_contactors&contacts/qet_directory
+++ b/elements/10_electric/10_allpole/310_relays_contactors&contacts/qet_directory
@@ -11,5 +11,6 @@
         <name lang="el">Ηλεκτρονόμοι και επαφές</name>
         <name lang="cs">Relé, stykače a kontakty</name>
         <name lang="da">Relæer, kontaktorer og kontakter</name>
+        <name lang="ja">継電器、接触器、接点</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/330_transformers&power_supplies/qet_directory b/elements/10_electric/10_allpole/330_transformers&power_supplies/qet_directory
index 44b83a28d..8fc5f529a 100644
--- a/elements/10_electric/10_allpole/330_transformers&power_supplies/qet_directory
+++ b/elements/10_electric/10_allpole/330_transformers&power_supplies/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Transformatoren en Voedingen</name>
         <name lang="cs">Trasformátory a proudové zdroje</name>
         <name lang="da">Transformer og strømforsyninger</name>
+        <name lang="ja">変圧器と電源</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/340_converters&inverters/qet_directory b/elements/10_electric/10_allpole/340_converters&inverters/qet_directory
index 0dd474601..95b58985e 100644
--- a/elements/10_electric/10_allpole/340_converters&inverters/qet_directory
+++ b/elements/10_electric/10_allpole/340_converters&inverters/qet_directory
@@ -10,5 +10,6 @@
         <name lang="nl">Omzetters en Omkeerders</name>
         <name lang="el">Μετατροπείς και αντιστροφείς</name>
         <name lang="cs">Měniče a plynulé převaděče</name>
+        <name lang="ja">変換器とインバータ</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/380_signaling&operating/qet_directory b/elements/10_electric/10_allpole/380_signaling&operating/qet_directory
index 21a009af8..e2ddf38cf 100644
--- a/elements/10_electric/10_allpole/380_signaling&operating/qet_directory
+++ b/elements/10_electric/10_allpole/380_signaling&operating/qet_directory
@@ -10,5 +10,6 @@
         <name lang="nl">Signalering en bediening</name>
         <name lang="el">Σήμανση και χειρισμός</name>
         <name lang="cs">Značení a příkazy</name>
+        <name lang="ja">信号と操作</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/390_sensors&instruments/qet_directory b/elements/10_electric/10_allpole/390_sensors&instruments/qet_directory
index 3a9763591..bc453fd16 100644
--- a/elements/10_electric/10_allpole/390_sensors&instruments/qet_directory
+++ b/elements/10_electric/10_allpole/390_sensors&instruments/qet_directory
@@ -10,5 +10,6 @@
         <name lang="nl">Sensoren en instrumenten</name>
         <name lang="el">Αισθητήρες και όργανα</name>
         <name lang="cs">Čidla a měřiče</name>
+        <name lang="ja">センサと計器</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/391_consumers&actuators/qet_directory b/elements/10_electric/10_allpole/391_consumers&actuators/qet_directory
index 47f367b73..3110f79a6 100644
--- a/elements/10_electric/10_allpole/391_consumers&actuators/qet_directory
+++ b/elements/10_electric/10_allpole/391_consumers&actuators/qet_directory
@@ -10,5 +10,6 @@
         <name lang="nl">Verbruikers en bewegingen</name>
         <name lang="el">Καταναλώσεις και ενεργοποιητές</name>
         <name lang="cs">Spotřebitelé a spouštěče</name>
+        <name lang="ja">消費装置と作動装置</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/392_generators&sources/qet_directory b/elements/10_electric/10_allpole/392_generators&sources/qet_directory
index d94fee3b9..dea83f5de 100644
--- a/elements/10_electric/10_allpole/392_generators&sources/qet_directory
+++ b/elements/10_electric/10_allpole/392_generators&sources/qet_directory
@@ -10,5 +10,6 @@
         <name lang="en">Generators and sources</name>
         <name lang="es">Generadores y fuentes</name>
         <name lang="fr">Générateurs et sources</name>
+        <name lang="ja">発電機と電源</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/395_electronics&semiconductors/qet_directory b/elements/10_electric/10_allpole/395_electronics&semiconductors/qet_directory
index 8fdf6b2fa..1ce585bac 100644
--- a/elements/10_electric/10_allpole/395_electronics&semiconductors/qet_directory
+++ b/elements/10_electric/10_allpole/395_electronics&semiconductors/qet_directory
@@ -10,5 +10,6 @@
         <name lang="nl">Electronica en halfgeleiders</name>
         <name lang="el">Ηλεκτρονικά και ημιαγωγοί</name>
         <name lang="cs">Elektronika a polovodiče</name>
+        <name lang="ja">電子と半導体</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/450_high_voltage/qet_directory b/elements/10_electric/10_allpole/450_high_voltage/qet_directory
index e1595a1b3..5571b04f9 100644
--- a/elements/10_electric/10_allpole/450_high_voltage/qet_directory
+++ b/elements/10_electric/10_allpole/450_high_voltage/qet_directory
@@ -12,5 +12,6 @@
         <name lang="ar">جهد عالي</name>
         <name lang="el">Υψηλή τάση</name>
         <name lang="nl">Hoogspanning</name>
+        <name lang="ja">高圧</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/500_home_installation/qet_directory b/elements/10_electric/10_allpole/500_home_installation/qet_directory
index d3d07c226..45c6c9604 100644
--- a/elements/10_electric/10_allpole/500_home_installation/qet_directory
+++ b/elements/10_electric/10_allpole/500_home_installation/qet_directory
@@ -12,5 +12,6 @@
         <name lang="it">Impianti civili</name>
         <name lang="el">Οικιακά</name>
         <name lang="nl">Huisinstallatie</name>
+        <name lang="ja">住宅設備</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/10_allpole/qet_directory b/elements/10_electric/10_allpole/qet_directory
index 77ec475c4..19ed3d024 100644
--- a/elements/10_electric/10_allpole/qet_directory
+++ b/elements/10_electric/10_allpole/qet_directory
@@ -11,5 +11,6 @@
         <name lang="ru">Многополюсные</name>
         <name lang="da">Flere ledere</name>
 		<name lang="es">Multifilar</name>
+		<name lang="ja">複線</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/11_singlepole/140_connectors&plugs/qet_directory b/elements/10_electric/11_singlepole/140_connectors&plugs/qet_directory
index 6ad2301b9..86f5bb262 100644
--- a/elements/10_electric/11_singlepole/140_connectors&plugs/qet_directory
+++ b/elements/10_electric/11_singlepole/140_connectors&plugs/qet_directory
@@ -10,5 +10,6 @@
         <name lang="en">Connectors and plugs</name>
         <name lang="es">Conectores y Enchufes</name>
         <name lang="fr">Connecteurs et prises</name>
+        <name lang="ja">コネクタとプラグ</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/11_singlepole/200_fuses&protective_gears/qet_directory b/elements/10_electric/11_singlepole/200_fuses&protective_gears/qet_directory
index ebaafd907..0ae22e4e0 100644
--- a/elements/10_electric/11_singlepole/200_fuses&protective_gears/qet_directory
+++ b/elements/10_electric/11_singlepole/200_fuses&protective_gears/qet_directory
@@ -9,5 +9,6 @@
         <name lang="it">Fusibili e protezioni</name>
         <name lang="en">Fuses and protective gears</name>
         <name lang="fr">Fusibles et protections</name>
+        <name lang="ja">ヒューズと保護装置</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/11_singlepole/330_transformers&power_supplies/qet_directory b/elements/10_electric/11_singlepole/330_transformers&power_supplies/qet_directory
index 1c15a57ac..24b58c971 100644
--- a/elements/10_electric/11_singlepole/330_transformers&power_supplies/qet_directory
+++ b/elements/10_electric/11_singlepole/330_transformers&power_supplies/qet_directory
@@ -10,5 +10,6 @@
         <name lang="en">Transformators and power supplies</name>
         <name lang="es">Transformadores y fuentes de poder</name>
         <name lang="fr">Transformateurs et alimentations</name>
+        <name lang="ja">変圧器と電源</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/11_singlepole/340_converters&inverters/qet_directory b/elements/10_electric/11_singlepole/340_converters&inverters/qet_directory
index f62782a27..a5465b854 100644
--- a/elements/10_electric/11_singlepole/340_converters&inverters/qet_directory
+++ b/elements/10_electric/11_singlepole/340_converters&inverters/qet_directory
@@ -10,5 +10,6 @@
         <name lang="en">Converters and inverters</name>
         <name lang="es">Convertidores e inversores</name>
         <name lang="fr">Convertisseurs et variateurs</name>
+        <name lang="ja">変換器とインバータ</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/11_singlepole/392_generators&sources/qet_directory b/elements/10_electric/11_singlepole/392_generators&sources/qet_directory
index d94fee3b9..dea83f5de 100644
--- a/elements/10_electric/11_singlepole/392_generators&sources/qet_directory
+++ b/elements/10_electric/11_singlepole/392_generators&sources/qet_directory
@@ -10,5 +10,6 @@
         <name lang="en">Generators and sources</name>
         <name lang="es">Generadores y fuentes</name>
         <name lang="fr">Générateurs et sources</name>
+        <name lang="ja">発電機と電源</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/11_singlepole/395_electronics&semiconductors/qet_directory b/elements/10_electric/11_singlepole/395_electronics&semiconductors/qet_directory
index 6eddc7e2d..d12cf1b27 100644
--- a/elements/10_electric/11_singlepole/395_electronics&semiconductors/qet_directory
+++ b/elements/10_electric/11_singlepole/395_electronics&semiconductors/qet_directory
@@ -10,5 +10,6 @@
         <name lang="en">Electronics and semiconductors</name>
         <name lang="es">Electrónica y semiconductores</name>
         <name lang="fr">Electronique et semi-conducteurs</name>
+        <name lang="ja">電子と半導体</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/11_singlepole/500_home_installation/qet_directory b/elements/10_electric/11_singlepole/500_home_installation/qet_directory
index d3d07c226..dcfc7de79 100644
--- a/elements/10_electric/11_singlepole/500_home_installation/qet_directory
+++ b/elements/10_electric/11_singlepole/500_home_installation/qet_directory
@@ -12,5 +12,6 @@
         <name lang="it">Impianti civili</name>
         <name lang="el">Οικιακά</name>
         <name lang="nl">Huisinstallatie</name>
+        <name lang="ja">住宅機器</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/11_singlepole/qet_directory b/elements/10_electric/11_singlepole/qet_directory
index 490878780..3a08386b4 100644
--- a/elements/10_electric/11_singlepole/qet_directory
+++ b/elements/10_electric/11_singlepole/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Enkel pool</name>
         <name lang="ru">Однополюсные</name>
         <name lang="da">Enkel leder</name>
+        <name lang="ja">単線</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/20_manufacturers_articles/qet_directory b/elements/10_electric/20_manufacturers_articles/qet_directory
index bdf51771e..6b0c54419 100644
--- a/elements/10_electric/20_manufacturers_articles/qet_directory
+++ b/elements/10_electric/20_manufacturers_articles/qet_directory
@@ -9,5 +9,6 @@
         <name lang="es">Articulos de fabricantes</name>
         <name lang="fr">Articles constructeurs</name>
         <name lang="da">Producent produkter</name>
+        <name lang="ja">製品</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/90_american_standards/15_allpole/qet_directory b/elements/10_electric/90_american_standards/15_allpole/qet_directory
index 5d8c82c81..2349e0ac7 100644
--- a/elements/10_electric/90_american_standards/15_allpole/qet_directory
+++ b/elements/10_electric/90_american_standards/15_allpole/qet_directory
@@ -10,5 +10,6 @@
         <name lang="en">All-pole</name>
         <name lang="fr">Multifilaire</name>
         <name lang="da">Flere ledere</name>
+        <name lang="ja">複線</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/90_american_standards/16_singlepole/qet_directory b/elements/10_electric/90_american_standards/16_singlepole/qet_directory
index 723d1fee1..4f2bbda30 100644
--- a/elements/10_electric/90_american_standards/16_singlepole/qet_directory
+++ b/elements/10_electric/90_american_standards/16_singlepole/qet_directory
@@ -10,5 +10,6 @@
         <name lang="en">Single pole</name>
         <name lang="fr">Unifilaire</name>
         <name lang="da">Enkel leder</name>
+        <name lang="ja">単線</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/90_american_standards/qet_directory b/elements/10_electric/90_american_standards/qet_directory
index a43d54c7d..acb9d9c6c 100644
--- a/elements/10_electric/90_american_standards/qet_directory
+++ b/elements/10_electric/90_american_standards/qet_directory
@@ -10,5 +10,6 @@
         <name lang="es">Estandares americanos</name>
         <name lang="fr">Américain</name>
         <name lang="da">Amerikansk standard</name>
+        <name lang="ja">米国規格</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/91_en_60617/qet_directory b/elements/10_electric/91_en_60617/qet_directory
index 0e5f4d220..5e1416b5c 100644
--- a/elements/10_electric/91_en_60617/qet_directory
+++ b/elements/10_electric/91_en_60617/qet_directory
@@ -3,5 +3,6 @@
         <name lang="fr">EN 60617</name>
         <name lang="es">IEC 60617</name>
         <name lang="da">DS/IEC 60617</name>
+        <name lang="ja">電気用図記号 (JIS C 0617 / IEC 60617)</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/98_graphics/01_auxiliary_symbols/qet_directory b/elements/10_electric/98_graphics/01_auxiliary_symbols/qet_directory
index 3a930e958..3a72445ab 100644
--- a/elements/10_electric/98_graphics/01_auxiliary_symbols/qet_directory
+++ b/elements/10_electric/98_graphics/01_auxiliary_symbols/qet_directory
@@ -8,5 +8,6 @@
         <name lang="nl">Symbolen voor tekeningen</name>
         <name lang="el">Βοηθητικά σύμβολα διαγραμμάτων</name>
         <name lang="cs">Pomocné symboly pro výkresy</name>
+        <name lang="ja">補助シンボル</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/98_graphics/11_tags&comments/qet_directory b/elements/10_electric/98_graphics/11_tags&comments/qet_directory
index ecbc91f6e..739969cc0 100644
--- a/elements/10_electric/98_graphics/11_tags&comments/qet_directory
+++ b/elements/10_electric/98_graphics/11_tags&comments/qet_directory
@@ -7,5 +7,6 @@
         <name lang="de">Etiketten und Kommentare</name>
         <name lang="nl">Labels en commentaren</name>
         <name lang="cs">Štítky a poznámky</name>
+        <name lang="ja">タグとコメント</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/98_graphics/21_forms&tabs/qet_directory b/elements/10_electric/98_graphics/21_forms&tabs/qet_directory
index 2005c47f1..f4918c0b9 100644
--- a/elements/10_electric/98_graphics/21_forms&tabs/qet_directory
+++ b/elements/10_electric/98_graphics/21_forms&tabs/qet_directory
@@ -7,5 +7,6 @@
         <name lang="de">Formulare und Tabellen</name>
         <name lang="nl">Formulieren en tabellen</name>
         <name lang="cs">Formuláře a tabulky</name>
+        <name lang="ja">フォームと表</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/98_graphics/99_assembly_plan/qet_directory b/elements/10_electric/98_graphics/99_assembly_plan/qet_directory
index 2db2d1e49..e45e3bab3 100644
--- a/elements/10_electric/98_graphics/99_assembly_plan/qet_directory
+++ b/elements/10_electric/98_graphics/99_assembly_plan/qet_directory
@@ -7,5 +7,6 @@
         <name lang="en">Thumbnails for assembly plan</name>
         <name lang="nl">Opbouwtekeningen</name>
         <name lang="cs">Náhledy montážního plánu</name>
+        <name lang="ja">組立図用サムネイル</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/98_graphics/qet_directory b/elements/10_electric/98_graphics/qet_directory
index 37e71e40d..3afa9d384 100644
--- a/elements/10_electric/98_graphics/qet_directory
+++ b/elements/10_electric/98_graphics/qet_directory
@@ -11,5 +11,6 @@
         <name lang="fr">Graphisme</name>
         <name lang="cs">Označení</name>
         <name lang="da">Grafik</name>
+        <name lang="ja">グラフィック</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/99_miscellaneous&unsorted/qet_directory b/elements/10_electric/99_miscellaneous&unsorted/qet_directory
index 61323ff7e..e0a5ffad4 100644
--- a/elements/10_electric/99_miscellaneous&unsorted/qet_directory
+++ b/elements/10_electric/99_miscellaneous&unsorted/qet_directory
@@ -11,5 +11,6 @@
         <name lang="es">Miscelánea y desordenados</name>
         <name lang="fr">Divers et non classés</name>
         <name lang="da">Diverse og ikke kategoriseret</name>
+        <name lang="ja">その他と未分類</name>
     </names>
 </qet-directory>
diff --git a/elements/10_electric/qet_directory b/elements/10_electric/qet_directory
index e75e0bf65..9bb603519 100644
--- a/elements/10_electric/qet_directory
+++ b/elements/10_electric/qet_directory
@@ -11,5 +11,6 @@
         <name lang="fr">Electrique</name>
         <name lang="da">Elektrisk</name>
 	<name lang="es">Eléctrica</name>
+        <name lang="ja">電気</name>
     </names>
 </qet-directory>
diff --git a/elements/20_logic/10_functions/qet_directory b/elements/20_logic/10_functions/qet_directory
index 41d5c8924..820a2d233 100644
--- a/elements/20_logic/10_functions/qet_directory
+++ b/elements/20_logic/10_functions/qet_directory
@@ -14,5 +14,6 @@
         <name lang="nl">Functie Plan (FUP)</name>
         <name lang="be">Logische poorten</name>
         <name lang="da">Logik funktioner</name>
+        <name lang="ja">論理ゲート</name>
     </names>
 </qet-directory>
diff --git a/elements/20_logic/20_grafcet/qet_directory b/elements/20_logic/20_grafcet/qet_directory
index 3ec959680..1602b0f82 100644
--- a/elements/20_logic/20_grafcet/qet_directory
+++ b/elements/20_logic/20_grafcet/qet_directory
@@ -12,5 +12,6 @@
         <name lang="nl">Grafcet afloopdiagram</name>
         <name lang="be">Functie diagram (Grafcet)</name>
         <name lang="da">Sekvens</name>
+        <name lang="ja">Grafcet</name>
     </names>
 </qet-directory>
diff --git a/elements/20_logic/30_ladder/qet_directory b/elements/20_logic/30_ladder/qet_directory
index 64cd3d072..965b8e265 100644
--- a/elements/20_logic/30_ladder/qet_directory
+++ b/elements/20_logic/30_ladder/qet_directory
@@ -14,5 +14,6 @@
         <name lang="nl">Ladder Diagram (KOP)</name>
         <name lang="be">Ladder (KOP)</name>
         <name lang="da">Ladder</name>
+        <name lang="ja">ラダー</name>
     </names>
 </qet-directory>
diff --git a/elements/20_logic/40_flowchart/qet_directory b/elements/20_logic/40_flowchart/qet_directory
index 4971b725f..2e06f443d 100644
--- a/elements/20_logic/40_flowchart/qet_directory
+++ b/elements/20_logic/40_flowchart/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Stroomschema</name>
         <name lang="be">Organisatieschema</name>
         <name lang="da">Rutediagram</name>
+        <name lang="ja">フローチャート</name>
     </names>
 </qet-directory>
diff --git a/elements/20_logic/qet_directory b/elements/20_logic/qet_directory
index 2eea90765..ecfc42c2e 100644
--- a/elements/20_logic/qet_directory
+++ b/elements/20_logic/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Logica</name>
         <name lang="ru">Логика</name>
         <name lang="da">Logik</name>
+        <name lang="ja">論理</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/20_manufacturers_articles/qet_directory b/elements/30_hydraulic/20_manufacturers_articles/qet_directory
index 2126d1361..5baaac24e 100644
--- a/elements/30_hydraulic/20_manufacturers_articles/qet_directory
+++ b/elements/30_hydraulic/20_manufacturers_articles/qet_directory
@@ -1,5 +1,6 @@
 <qet-directory>
     <names>
         <name lang="en">Manufacturers Articles</name>
+        <name lang="ja">製品</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/21_tanks/qet_directory b/elements/30_hydraulic/21_tanks/qet_directory
index f3ec8b657..250e2b6a1 100644
--- a/elements/30_hydraulic/21_tanks/qet_directory
+++ b/elements/30_hydraulic/21_tanks/qet_directory
@@ -10,6 +10,7 @@
         <name lang="nl">Tanks hydrauliek</name>
         <name lang="el">Δεξαμενές</name>
         <name lang="da">Tanke</name>
+        <name lang="ja">タンク</name>
     </names>
 </qet-directory>
 
diff --git a/elements/30_hydraulic/31_control_valves/qet_directory b/elements/30_hydraulic/31_control_valves/qet_directory
index 7e3a170c0..f2d4e17df 100644
--- a/elements/30_hydraulic/31_control_valves/qet_directory
+++ b/elements/30_hydraulic/31_control_valves/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Stuurkleppen 2 standen</name>
         <name lang="el">Βαλβίδες ελέγχου</name>
         <name lang="da">Styre ventiler</name>
+        <name lang="ja">制御弁</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/45_valves/qet_directory b/elements/30_hydraulic/45_valves/qet_directory
index 2380e9760..d644451f4 100644
--- a/elements/30_hydraulic/45_valves/qet_directory
+++ b/elements/30_hydraulic/45_valves/qet_directory
@@ -10,5 +10,6 @@
         <name lang="el">Βαλβίδες</name>
         <name lang="nl">Kleppen</name>
         <name lang="da">Ventiler</name>
+        <name lang="ja">弁</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/51_cylinders/qet_directory b/elements/30_hydraulic/51_cylinders/qet_directory
index e2fc2767a..65ea46d39 100644
--- a/elements/30_hydraulic/51_cylinders/qet_directory
+++ b/elements/30_hydraulic/51_cylinders/qet_directory
@@ -10,5 +10,6 @@
         <name lang="el">Έμβολα</name>
         <name lang="nl">Cilinders</name>
         <name lang="da">Cylindre</name>
+        <name lang="ja">シリンダ</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/61_pumps/qet_directory b/elements/30_hydraulic/61_pumps/qet_directory
index 279ab6cbf..147db2262 100644
--- a/elements/30_hydraulic/61_pumps/qet_directory
+++ b/elements/30_hydraulic/61_pumps/qet_directory
@@ -10,5 +10,6 @@
         <name lang="it">Pompe</name>
         <name lang="nl">Pompen, motoren</name>
         <name lang="da">Pumper</name>
+        <name lang="ja">ポンプ</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/71_exchangers/qet_directory b/elements/30_hydraulic/71_exchangers/qet_directory
index 3d50749d1..e719ed1e6 100644
--- a/elements/30_hydraulic/71_exchangers/qet_directory
+++ b/elements/30_hydraulic/71_exchangers/qet_directory
@@ -10,5 +10,6 @@
         <name lang="el">Εναλλάκτες θερμότητας</name>
         <name lang="nl">Warmtewisselaar</name>
         <name lang="da">Varme veksler</name>
+        <name lang="ja">熱交換器</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/81_filters/qet_directory b/elements/30_hydraulic/81_filters/qet_directory
index c4dc6ee2e..2bc36de19 100644
--- a/elements/30_hydraulic/81_filters/qet_directory
+++ b/elements/30_hydraulic/81_filters/qet_directory
@@ -10,5 +10,6 @@
         <name lang="it">Filtri</name>
         <name lang="nl">Filters</name>
         <name lang="da">Filtre</name>
+        <name lang="ja">フィルタ</name>
     </names>
 </qet-directory>
diff --git a/elements/30_hydraulic/qet_directory b/elements/30_hydraulic/qet_directory
index 2155b7350..4aac5e4a3 100644
--- a/elements/30_hydraulic/qet_directory
+++ b/elements/30_hydraulic/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Hydrauliek</name>
         <name lang="ru">Гидравлика</name>
         <name lang="da">Hydraulik</name>
+        <name lang="ja">油圧・水圧</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/21_tanks/qet_directory b/elements/50_pneumatic/21_tanks/qet_directory
index f9a99fd12..603ffde32 100644
--- a/elements/50_pneumatic/21_tanks/qet_directory
+++ b/elements/50_pneumatic/21_tanks/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Tanks</name>
         <name lang="el">Δοχεία</name>
         <name lang="da">Tanke</name>
+        <name lang="ja">タンク</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/31_control_valves/qet_directory b/elements/50_pneumatic/31_control_valves/qet_directory
index 7e3a170c0..f2d4e17df 100644
--- a/elements/50_pneumatic/31_control_valves/qet_directory
+++ b/elements/50_pneumatic/31_control_valves/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Stuurkleppen 2 standen</name>
         <name lang="el">Βαλβίδες ελέγχου</name>
         <name lang="da">Styre ventiler</name>
+        <name lang="ja">制御弁</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/45_valves/qet_directory b/elements/50_pneumatic/45_valves/qet_directory
index 2380e9760..d644451f4 100644
--- a/elements/50_pneumatic/45_valves/qet_directory
+++ b/elements/50_pneumatic/45_valves/qet_directory
@@ -10,5 +10,6 @@
         <name lang="el">Βαλβίδες</name>
         <name lang="nl">Kleppen</name>
         <name lang="da">Ventiler</name>
+        <name lang="ja">弁</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/51_cylinders/qet_directory b/elements/50_pneumatic/51_cylinders/qet_directory
index af0519985..1200df40c 100644
--- a/elements/50_pneumatic/51_cylinders/qet_directory
+++ b/elements/50_pneumatic/51_cylinders/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Cilinders</name>
         <name lang="el">Έμβολα</name>
         <name lang="da">Cylindre</name>
+        <name lang="ja">シリンダ</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/61_drives/qet_directory b/elements/50_pneumatic/61_drives/qet_directory
index 7409d60e8..169386a2b 100644
--- a/elements/50_pneumatic/61_drives/qet_directory
+++ b/elements/50_pneumatic/61_drives/qet_directory
@@ -9,5 +9,6 @@
         <name lang="nl">Aandrijvingen</name>
         <name lang="cs">Pohony</name>
         <name lang="da">Drev</name>
+        <name lang="ja">駆動</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/81_air_treatment/qet_directory b/elements/50_pneumatic/81_air_treatment/qet_directory
index e76074a34..47fbac94a 100644
--- a/elements/50_pneumatic/81_air_treatment/qet_directory
+++ b/elements/50_pneumatic/81_air_treatment/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Luchtbehandeling</name>
         <name lang="el">Διαχείριση αέρα</name>
         <name lang="da">Trykluft</name>
+        <name lang="ja">空気処理</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/91_vacuum/qet_directory b/elements/50_pneumatic/91_vacuum/qet_directory
index 8a534c96d..31446811e 100644
--- a/elements/50_pneumatic/91_vacuum/qet_directory
+++ b/elements/50_pneumatic/91_vacuum/qet_directory
@@ -10,5 +10,6 @@
         <name lang="nl">Vacuum</name>
         <name lang="el">Υποπίεση</name>
         <name lang="da">Vakuum</name>
+        <name lang="ja">真空</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/95_lines&connections/qet_directory b/elements/50_pneumatic/95_lines&connections/qet_directory
index 2e5541867..84cdabd6c 100644
--- a/elements/50_pneumatic/95_lines&connections/qet_directory
+++ b/elements/50_pneumatic/95_lines&connections/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Verbindingen</name>
         <name lang="el">Σύνδεσμοι σωλήνων</name>
         <name lang="da">Rør og fittings</name>
+        <name lang="ja">線と接続</name>
     </names>
 </qet-directory>
diff --git a/elements/50_pneumatic/qet_directory b/elements/50_pneumatic/qet_directory
index 9c510ac19..8851f8134 100644
--- a/elements/50_pneumatic/qet_directory
+++ b/elements/50_pneumatic/qet_directory
@@ -11,5 +11,6 @@
         <name lang="nl">Pneumatiek</name>
         <name lang="ru">Пневматика</name>
         <name lang="da">Pneumatik</name>
+        <name lang="ja">空気圧</name>
     </names>
 </qet-directory>
diff --git a/elements/60_energy/11_water/qet_directory b/elements/60_energy/11_water/qet_directory
index 925938d85..d9bfed5f9 100644
--- a/elements/60_energy/11_water/qet_directory
+++ b/elements/60_energy/11_water/qet_directory
@@ -9,5 +9,6 @@
         <name lang="it">Acqua</name>
         <name lang="cs">Voda</name>
         <name lang="da">VVS teknik</name>
+        <name lang="ja">水</name>
     </names>
 </qet-directory>
diff --git a/elements/60_energy/21_refrigeration/qet_directory b/elements/60_energy/21_refrigeration/qet_directory
index 593b4efd9..5122431ae 100644
--- a/elements/60_energy/21_refrigeration/qet_directory
+++ b/elements/60_energy/21_refrigeration/qet_directory
@@ -11,5 +11,6 @@
         <name lang="el">Ψύξη</name>
         <name lang="nl">Koelers</name>
         <name lang="da">Køle teknik</name>
+        <name lang="ja">冷凍機</name>
     </names>
 </qet-directory>
diff --git a/elements/60_energy/31_solar_thermal/qet_directory b/elements/60_energy/31_solar_thermal/qet_directory
index ac5097916..0f667779c 100644
--- a/elements/60_energy/31_solar_thermal/qet_directory
+++ b/elements/60_energy/31_solar_thermal/qet_directory
@@ -11,5 +11,6 @@
         <name lang="el">Ηλιακή θέρμανση</name>
         <name lang="nl">Zon thermisch</name>
         <name lang="da">Sol og varme teknik</name>
+        <name lang="ja">太陽熱</name>
     </names>
 </qet-directory>
diff --git a/elements/60_energy/41__manufacturers_articles/qet_directory b/elements/60_energy/41__manufacturers_articles/qet_directory
index bdf51771e..6b0c54419 100644
--- a/elements/60_energy/41__manufacturers_articles/qet_directory
+++ b/elements/60_energy/41__manufacturers_articles/qet_directory
@@ -9,5 +9,6 @@
         <name lang="es">Articulos de fabricantes</name>
         <name lang="fr">Articles constructeurs</name>
         <name lang="da">Producent produkter</name>
+        <name lang="ja">製品</name>
     </names>
 </qet-directory>
diff --git a/elements/60_energy/qet_directory b/elements/60_energy/qet_directory
index f07615fbf..4b9e86195 100644
--- a/elements/60_energy/qet_directory
+++ b/elements/60_energy/qet_directory
@@ -12,5 +12,6 @@
         <name lang="nl">Energie</name>
         <name lang="ru">Сантехника</name>
         <name lang="da">Energi teknik</name>
+        <name lang="ja">エネルギー</name>
     </names>
 </qet-directory>