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

今春[konshun] this spring
昨春[sakushun] last spring
三春[sanshun] three spring months
思春期[shishunki] puberty
春たけなわ[harutakenawa] spring is in full swing

春めく[harumeku] to become spring-like
春一番[haruichiban] first storm of spring
春夏秋冬[shunkashuutou] spring, summer, autumn (fall) and winter
春画[shunga] shunga

助番[sukeban] leader of a female gang
ブロック番号[burokkubangou] block number
暗唱番号[anshoubangou] personal identification number
一貫番号[ikkanbangou] serial number
一番[ichiban] best

一番[hitotsugai] pair
一番鶏[ichibandori] first cockcrowing
一番手[ichibante] first player
一番乗り[ichibannori] leader of a charge
一番線[ichibansen] track no. 1