- Afrikaans: See van Japan
- Albanian: Deti i Japonisë
- Arabic: بَحْر اَلْيَابَان m (baḥr al-yābān)
- Armenian: Ճապոնական ծով (Čaponakan cov)
- Asturian: Mar de Xapón
- Azeri: Yaponiya Dəniz
- Belarusian: Япо́нскае мо́ра n (Japónskaje móra)
- Bulgarian: Япо́нско мо́ре n (Japónsko móre)
- Catalan: mar del Japó
- Chinese:
- Cantonese: 日本海 (jat6 bun2 hoi2)
- Mandarin: 日本海 (zh) (Rìběn hǎi)
- Min Nan: 日本海 (Ji̍t-pún-hái)
- Czech: Japonské moře (cs) n
- Danish: Japanske Hav
- Dutch: Japanse Zee
- Esperanto: Japana maro
- Estonian: Jaapani meri
- Finnish: Japaninmeri
- French: mer du Japon (fr) f
- Georgian: იაპონიის ზღვა (iaṗoniis zɣva)
- German: Japanisches Meer (de) n
- Hebrew: ים יפן m (yam yapan)
- Hindi: जापान सागर m (jāpān sāgar)
- Hungarian: Japán-tenger (hu)
- Icelandic: Japanshaf
- Indonesian: Laut Jepang
- Irish: Muir na Seapáine f
- Italian: Mar del Giappone m
- Japanese: 日本海 (ja) (にほんかい, nihonkai)
- Khmer: សមុទ្រជប៉ុន (sa’mot chea’pon)
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- Korean: 일본해 (ko) (ilbonhae) (日本海) (seldom used by Koreans, "Japan Sea"), 동해 (ko) (donghae) (東海 (ko)) (South Korean, "Eastern Sea"), 조선동해 (ko) (joseondonghae) (朝鮮東海) (North Korean, "Korean Sea")
- Kurdish:
- Kurmanji: Derya Japon
- Lao: ທະເລຍີ່ປຸ່ນ (lo) (tha lē nyī pun)
- Latvian: Japāņu jūra f
- Lithuanian: Japonijos jūra f
- Malay: Laut Jepun
- Maltese: il-Baħar tal-Ġappun
- Mongolian: Япон тэнгис (Japon tengis)
- Norwegian: Japanhavet
- Persian: دریای ژاپن (daryâ-ye Žâpon)
- Polish: Morze Japońskie n
- Portuguese: Mar do Japão m
- Romanian: Marea Japoniei f
- Russian: Япо́нское мо́ре (ru) n (Japónskoje móre)
- Serbo-Croatian:
- Cyrillic: Јапанско море n
- Roman: Japansko more n
- Slovak: Japonské more n
- Slovene: Japonsko morje n
- Spanish: mar del Japón m
- Swedish: Japanska havet
- Tagalog: Dagat ng Hapon
- Tajik: Баҳри Ҷопон (Bahri Jopon)
- Thai: ทะเลญี่ปุ่น (tá-lay yêe-bpùn)
- Turkish: Japon Denizi
- Turkmen: Ýapon deňzi
- Ukrainian: Япо́нське мо́ре n (Japónsʹke móre)
- Vietnamese: biển Nhật Bản
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