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

一国一票[ikkokuippyou] one vote per nation
一般投票[ippantouhyou] referendum
一票[ippyou] ballot
開票[kaihyou] counting ballots
軍票[gunpyou] military scrip

原票[genpyou] stub (of a checkbook, chequebook)
国民投票[kokumintouhyou] national referendum
再投票[saitouhyou] revoting
住民票[juuminhyou] certificate of residence
信任投票[shinnintouhyou] vote of confidence