ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

一審[isshin] first instance
下級審[kakyuushin] lower court
勘審[kanshin] careful investigation
球審[kyuushin] baseball chief umpire
結審[kesshin] conclusion of trial (hearing)

原審[genshin] original sentence
誤審[goshin] misjudgment
口頭審理[koutoushinri] oral proceedings
控訴審[kousoshin] appeal trial
再審[saishin] review