noun
match fixing; fixed game; put-up job
Refers to a prearranged outcome in sports, games, or contests where the result is secretly decided beforehand. Often used in sumo, martial arts, and other competitive contexts. The term originates from a Meiji-era greengrocer's nickname.
その相撲の取組は八百長だったと疑われている。
That sumo bout is suspected of having been fixed.
八百長が発覚して、選手は出場停止になった
The match fixing was uncovered, and the athlete was suspended.
From the nickname of a Meiji-period greengrocer named 八百屋長兵衛 (Yaoya Chōbei) who would intentionally lose at Go to please his customers, giving rise to the term for a fixed match.