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

悪投[akutou] wild pitch
意気投合[ikitougou] hit it off with (a person)
一挙手一投足[ikkyoshuittousoku] slight effort
一般投票[ippantouhyou] referendum
円盤投げ[enbannage] discus throw

下手投げ[shitatenage] underhand throw
海外投資[kaigaitoushi] overseas investment
外国投資家[gaikokutoushika] foreign investor
間投詞[kantoushi] interjection
空中投下[kuuchuutouka] airdrop