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

御中[onaka] stomach
御話中[ohanashichuu] busy (phone)
アル中[aruchuu] alcoholism
π中間子[paichuukanshi] pi meson
暗中[anchuu] in the dark

暗中摸索[anchuumosaku] groping in the dark
意中[ichuu] one's mind
意中の女[ichuunoonna] sweetheart
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一日中[ichinichijuu] all day long

お七夜[oshichiya] name-giving ceremony
一昨夜[issakuya] night before last
一昼夜[icchuuya] whole day and night
一日一夜[ichinichiichiya] all day and night
一夜乞食[ichiyakojiki] (a) person made homeless by fire

一夜造り[ichiyazukuri] built in a night
一夜大臣[ichiyadaijin] overnight millionaire
一夜づけ[ichiyazuke] last-minute cramming
寒夜[kanya] cold night
夜露死苦[yoroshiku] well