noun
backward belt throw
A sumo kimarite where the attacker pulls the opponent's belt and throws them backward over the attacker's body.
横綱は波離間投げで相手を土俵に転がした。
The yokozuna rolled his opponent onto the dohyo with a backward belt throw.
The term is a sumo-specific compound. The exact derivation of 波離間 is uncertain; it is conventionally associated with this particular throwing technique.