gold star) is a notation used in professional sumo wrestling to record a lower-ranked (maegashira) wrestler's victory over a yokozuna.
The word kinboshi first came into popular use in the Taishō period (1912–1926), and the system of monetarily awarding a maegashira who defeated a yokozuna in an official tournament began in January, 1930.
This balance is converted using a multiplier, presently 4,000, and added to the wrestler's bonus in every subsequent tournament in which he competes as a sekitori.
With six tournaments a year, this one victory corresponds to a pay increase of 240,000 yen per annum for the remainder of the wrestler's sekitori career.
Kinboshi appearing in individual wrestlers' records before they began to be awarded in January, 1930 are unofficial and retrospectively conferred.