「川」 (kawa) means "river." It's a natural flowing watercourse, typically freshwater, flowing towards an ocean, lake, or another river. Rivers are essential for various ecosystems and human activities like fishing or bathing.

「川(かわ)」は、海(うみ)や湖(みずうみ)へ流(なが)れる自然(しぜん)の大(おお)きな水(みず)の流れ(ながれ)です。