noun
children's sumo
Refers to sumo wrestling for children, often as a playful or educational activity rather than professional competition. The term is used in the context of sumo.
地域の祭りで腕白相撲大会が開かれた。
A children's sumo tournament was held at the local festival.
Compound of 腕白 (わんぱく, 'naughty child') and 相撲 (すもう, 'sumo'). The exact origin is uncertain, but it likely arose to describe informal sumo matches among children.