Denshi Jisho — Online Japanese dictionary

ウォールアイ walleye (Sander vitreus)
Noun 
ウオッチャー watcher
Noun 
ウオッチング watching
Noun 
ウオルナット walnut
Noun 
ウオーキング walking
Noun 
ウオークライ war cry
Noun 
ウオーニング warning
Noun 
ウオームギア worm gear
Noun 
ウグイスガイ Pteria brevialata (species of wing oyster)
Noun, Usually written using kana alone 
ウシノケグサ sheep's fescue (Festuca ovina)
Noun, Usually written using kana alone 
うじゃうじゃ in swarms
Adverb, Noun, Suru verb 
ウスユキソウ Leontopodium japonicum (species of perennial closely related to edelweiss)
Noun, Usually written using kana alone 
ウスユキバト diamond dove (Geopelia cuneata)
Noun, Usually written using kana alone 
ウズラクイナ corn crake; corncrake; land rail (Crex crex)
Noun, Usually written using kana alone 
ウダイカンバ monarch birch (Betula maximowicziana); Japanese birch
Noun, Usually written using kana alone 
ウチナーグチ words and phrases only used in Okinawa; Okinawa dialect
Noun, Usually written using kana alone 
うちわやんま Sinictinogomphus clavatus (species of clubtail dragonfly)
Noun, Usually written using kana alone 
ウチワヤンマ Sinictinogomphus clavatus (species of clubtail dragonfly)
Noun, Usually written using kana alone 
うっかりミス honest mistake
Noun 
うっとりする 1: to be entranced; to be enraptured; to be transported; to be fascinated;
2: to be absentminded; to be miles away; to be in a world of one's own
Expression, Suru verb - irregular 
ウッドチップ woodchip
Noun 
ウッドパルプ woodpulp
Noun 
ウッドメタル Wood's metal
Noun 
うつらうつら drowsily; nodding off
Adverb 
ウミイグアナ marine iguana (Amblyrhynchus cristatus)
Noun, Usually written using kana alone 
ウミザリガニ lobster
Noun, Usually written using kana alone, Obscure term 

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