「八」(hachi) means "eight" or "8". It's used for counting various objects, people, or within larger numbers. For example, 「八つ」(yattsu) means "eight things". It's a fundamental part of the Japanese counting system.

「八(はち)」は「8」を意味(いみ)します。物(もの)を数(かぞ)える時(とき)や数量(すうりょう)を示(しめ)す時(とき)に使(つか)います。例(れい)：「八(やっ)つ」。