Denshi Jisho — Online Japanese dictionary

一心三観 いっしんさんがん simultaneous contemplation of the threefold truth (form of Tendai meditation)
Noun, Buddhist term 
一心同体 いっしんどうたい being one in body and soul; of one flesh; two hearts beating as one
Noun 
一世一元 いっせいいちげん the practice of assigning one era name to one emperor
Noun 
一世一代 いっせいいちだい once in a lifetime; the first and last occurrence (event, experience) of one's lifetime
Irregular kana usage, Noun, No-adjective 
一斉検挙 いっせいけんきょ wholesale arrest; round-up
Noun 
一斉射撃 いっせいしゃげき volley firing; fusillade; broadside
Noun 
一斉送信 いっせいそうしん simultaneous transmission
Noun, Computer terminology 
一殺多生 いっせつたしょう It is justifiable to kill one (harmful) person to save the lives of many
Expression 
一体全体 いったいぜんたい ... the heck (e.g. "what the heck?"); ... in the world (e.g. "why in the world?"); ... on earth (e.g. "who on earth?")
Adverb 
一張一弛 いっちょういっし tension and relaxation
Noun 
一朝有事 いっちょうゆうじ (when) the time of need arises; should an emergency occur
Expression 
一擲千金 いってきせんきん being lavish with one's money; spending a huge sum of money at once on a treat
Expression 
一徹短慮 いってつたんりょ stubborn and short-tempered
Noun, Na-adjective 
一点一画 いってんいっかく the dots of i's and the crosses of t's; (not neglecting) the slightest details
Noun 
一等軍曹 いっとうぐんそう sergeant first-class
Noun 
一等最初 いっとうさいしょ first off; first thing
Adverb 
一党独裁 いっとうどくさい one-party rule
Noun 
一得一失 いっとくいっしつ gaining some and losing some; (something having its) advantages and disadvantages
Noun 
一杯一杯 いっぱいいっぱい 1: one cup after another; cup by cup;
2: to the limit; to the fullest extent; absolutely the limit; the best one can do; breaking even
Na-adjective, Adverbial noun, Noun 
一泊行軍 いっぱくこうぐん an overnight march
Noun 
一発回答 いっぱつかいとう first and final offer in labor-management negotiations
Noun 
一発勝負 いっぱつしょうぶ contest decided by a single round (bout); contest decided by a single roll of dice; one-shot game (contest); make-or-break game
Noun 
一般会計 いっぱんかいけい general accounting and finance
Noun 
一般概念 いっぱんがいねん general idea
Noun 
一般原則 いっぱんげんそく general principle
Noun, Computer terminology 
一般公開 いっぱんこうかい 1: open to the public;
2: (Noun) (Computer terminology) read permission: anybody
Noun, Suru verb 

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