Denshi Jisho — Online Japanese dictionary

一閃 いっせん flash; brandish
Noun, Suru verb 
一双 いっそう pair (esp. of folding screens)
Noun 
一曹 いっそう master sergeant (JSDF)
Noun 
一艘 いっそう one ship or boat
Noun 
一束 いっそく a bundle; a hundred
Noun, No-adjective 
一村 いっそん village; whole village
Noun 
一隊 いったい party; gang; company; squad
Noun 
一択 いったく (only) one option (game slang); one possible choice
Noun, Slang 
一反 いったん one-tenth hectare
Noun 
一段 いったん one-tenth hectare
Noun 
一対 いっつい pair; couple
Noun, No-adjective 
一擲 いってき casting off or away
Noun, Suru verb 
一滴 いってき drop (of fluid)
Adverbial noun, Temporal noun 
一徹 いってつ obstinate; stubborn; inflexible
Na-adjective, Noun, No-adjective 
一天 いってん the whole sky; firmament
Noun 
一転 いってん turn; complete change
Adverbial noun 
一刀 いっとう 1: sword; blade;
2: single stroke
Noun 
一等 いっとう first-class; first-rank; A1; the most; the best
Noun, No-adjective 
一統 いっとう lineage; line; unification; all (of you)
Noun 
一頭 いっとう one large animal (horses, cattle, etc.); head (of cattle)
Noun 
一時 いっとき 1: moment; a (short) time; a while;
2: (Archaism) two-hour period
Temporal noun, Adverbial noun 
一得 いっとく one advantage; merit
Noun 
一徳 いっとく virtue
Noun 
一拍 いっぱく 1: one clap;
2: one beat;
3: one mora (taken as a unit of time)
Noun 
一白 いっぱく 1: first of nine traditional astrological signs (corresponding to Mercury and north);
2: white patch on one foot of a horse; horse with such a patch;
3: surface (landscape) that is white all over; pure white
Noun 
一箱 いっぱこ a (one) box
Noun 

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