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

ＡＢＣ順[eebiishiijun] alphabetical order
雨天順延[utenjunen] rescheduled in case of rain
演算手順[enzantejun] algorithm
温順[onjun] docile
帰順[kijun] submission

恭順[kyoujun] allegiance
五十音順[gojuuonjun] the syllabary order
語順[gojun] word order
孝順[koujun] obedience
降順[koujun] descending-order