後半 (kōhan) means “second half” | MotiTan Japanese Dictionary

More examples

試合の後半では、選手たちの動きが速くなります。shi ai no kō han de wa sen shu ta chi no ugo ki ga haya ku na ri ma su

In the second half of the game, the players move faster.

Refers to the later part of something divided into two equal or roughly equal parts.

後期kōki: The latter period of a longer period or process.
後半戦kōhansen: The second half of a sports game or other contest.

二つに分けた時間や出来事のうち、後に当たる部分。futa tsu ni wa ke ta ji kan ya de ki goto no u chi ato ni a ta ru bu bun

The compound 後半 (kōhan) joins 後 (kō, "after") with 半 (han, "half"), so it means the half that follows the first.

A meeting or school term can also have a 後半 (kōhan), so the word is not limited to games.