A professional sumo wrestler with more wins than losses in a tournament has achieved kachi-koshi.
Kachi-koshi generally means a winning record. In a standard 15-day tournament, a wrestler earns it with at least eight wins; in a seven-bout schedule, the threshold is usually four wins. The result can affect promotion, especially for wrestlers near a divisional boundary.
The opposite result is make-koshi, meaning more losses than wins. The consequences depend on rank: a kachi-koshi at a high rank does not guarantee promotion, while a make-koshi can cause demotion.
Kachi-koshi describes a tournament record, not a single victory and not the championship. A wrestler can achieve kachi-koshi without winning the yūshō, because the championship goes to the wrestler with the best overall record and any required playoff result.