Top matchさい賽saiNoundice; dieFormal or literary termsee サイコロ賽は投げられた。The die is cast.Also written 采【さい】sai、骰子【さい】saiCopy Listen Pitch on OJAD Explore
賽の河原さいのかわらsainokawaraExpressions (phrases, clauses, etc.), NounChildren's Limbo · futile; unrewarding