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

タクシーに乗る[takushiininoru] to take a taxi
タクシー乗り場[takushiinoriba] taxi rank
バスに乗る[basuninoru] to take the bus
悪乗り[warunori] overdoing
移乗[ijou] transferring (to another ship, etc.)

一人乗り[ichininnori] single seater (e.g. boat, aeroplane, airplane)
一天万乗[ittenbanjou] the whole realm
一番乗り[ichibannori] leader of a charge
遠乗り[toonori] long ride
下乗[gejou] dismounting