noun
insect fighting; bug sumo
Refers to the practice or event of pitting insects (often beetles) against each other in a sumo-like contest, popular as a traditional pastime in Japan.
夏になると、子どもたちは虫相撲を楽しむ。
In summer, children enjoy insect sumo.
この地域では毎年虫相撲大会が開かれる。
An insect sumo tournament is held every year in this region.
A more general term for insect fighting, not necessarily sumo-style.
Compound of 虫 (mushi, 'insect') and 相撲 (sumō, 'sumo wrestling'). The term directly describes insect sumo, a traditional pastime.