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

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

御茶[ocha] tea (usu. green)
鳥竜茶[uuroncha] oolong tea
一番茶[ichibancha] first-grade tea (first picking)
黄枯茶[kigaracha] bluish yellow
喫茶[kissa] tea drinking

喫茶店[kissaten] coffee lounge
休茶屋[yasumijaya] wayside teahouse
玄米茶[genmaicha] tea (with roasted rice)
古茶[kocha] last year's tea
口茶[kuchija] adding more tea