noun
3x3 basketball
Refers to the half-court basketball format with three players per side.
３ｘ３は東京オリンピックから正式種目になった。
3x3 basketball became an official event starting from the Tokyo Olympics.
彼はストリートで３ｘ３をよくプレーしている。
He often plays 3x3 on the street.
From English '3x3', referring to the three-on-three format.