noun
one minute
Standard unit of time; 60 seconds.
ここから駅まで歩いて１分です。
It's a one-minute walk from here to the station.
あと１分で授業が始まる。
Class starts in one minute.
一分 (いちぶ) means 'one part' or 'one percent' and is not a unit of time.
１秒 means 'one second', a smaller unit of time.
Compound of 一 (いち, 'one') + 分 (ふん, 'minute'), with regular sound change いちふん → いっぷん.