1.
one minute
A single minute of clock time or duration. Often used loosely for "a moment", as in 一分待って (hang on a second).
あと一分です。
One minute to go.
The counter 分 changes shape after certain numbers: いっぷん, にふん, さんぷん, よんぷん, ごふん, ろっぷん, ななふん, はっぷん, きゅうふん, じゅっぷん. Learners should memorise this set as a block rather than one number at a time.
Common collocations
Usage
The same characters read いちぶ mean "one part" or "one tenth", as in 一分の隙もない (without the slightest opening). Context and reading, not the writing, tell the two apart.