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

一尺[isshaku] approx. 30 cm
滑り尺[suberijaku] slide rule
計算尺[keisanjaku] slide rule
三尺[sanjaku] 3 Japanese feet
三尺の秋水[sanjakunoshuusui] sharpened sword

三尺の童子[sanjakunodouji] mere child
三尺帯[sanjakuobi] waistband
尺貫法[shakkanhou] old Japanese system of weights and measures
尺度[shakudo] linear measure