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ball (for sport, games, etc.)
kemari; type of football played by courtiers in ancient Japan
子供たちが庭で鞠を蹴って遊んでいる。
The children are playing kicking a ball in the garden.
子供たちが鞠で遊んでいます。
The children are playing with a ball.
昔の子供は手作りの鞠で遊んだものだ。
Children in the old days used to play with handmade balls.