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

一棟[hitomune] one house
上棟[joutou] raising the ridgepole
上棟式[joutoushiki] ridgepole-raising ceremony
棟上げ式[muneageshiki] framework raising ceremony

棟木[munagi] ridgepole
棟梁[touryou] chief support
病棟[byoutou] (hospital) ward
別棟[betsumune] separate building