一撃

いちげき

blow, hit, poke

会心の友

かいしんのとも

kindred soul, congenial friend

会心の作

かいしんのさく

work after one's heart

一撃の下に

いちげきのもとに いちげきのしたに

by a single blow

会心

かいしん

congeniality, satisfaction

一心

いっしん

one mind

一撃のもとに

いちげきのもとに

with a single blow; with one stroke

一億一心

いちおくいっしん

national unity (esp. during wartime)

一期一会

いちごいちえ

once-in-a-lifetime encounter (hence should be cherished as such)

一斉射撃

いっせいしゃげき

volley firing, fusillade, broadside

突撃一番

とつげきいちばん

condom

一安心

ひとあんしん

feeling of relief

一つ心

ひとつこころ

one mind, the whole heart, wholeheartedness

一心に

いっしんに

wholeheartedly, single-mindedly, fervently, intently

一次会

いちじかい

main party (of the night); first party

一門会

いちもんかい

meeting or association of followers of a famous performer (in rakugo, etc.)

人心一新

じんしんいっしん

complete change in public sentiment, leading the thought of the people to an entirely different channel

物心一如

ぶっしんいちにょ

Matter and mind are one, body and mind as one

心機一転

しんきいってん

changing one's attitude, turning over a new leaf, getting a fresh start