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Evidence-led referenceJapanese names, readings and kanji
japanesenameatlas.infoJapanese name reference
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Search accepts romaji with or without common macrons, either kana script, or a kanji/written form. Results stay tied to source-recorded entries.

9 resultsKana-reading search for “こさい”. Normalized alternatives: こさい · コサイ.
Surname · matching source form

Kosai

小佐井 こさい

10 matching source forms · Explore →Surname · matching source form

Kozai

古在 こざい

6 matching source forms · Explore →Given name · matching source form

Kosai

湖彩 こさい

2 matching source forms · Explore →Surname · matching source form

Gosai

吾妻 ごさい

1 matching source form · Explore →Surname · matching source form

Kosaido

小才度 こさいど

1 matching source form · Explore →Surname · matching source form

Kosaihira

小齊平 こさいひら

1 matching source form · Explore →Surname · matching source form

Kosaiku

小細工 こさいく

1 matching source form · Explore →Surname · matching source form

Kozaiku

小細工 こざいく

1 matching source form · Explore →Surname · matching source form

Kozaiwa

古座岩 こざいわ

1 matching source form · Explore →
Search behaviorYūki can also test Yuki/Yuuki-style search forms; hiragana and katakana are normalized to the same reading space; kanji queries use exact or beginning-of-written-form matches.