Butt-Based Fighting Game Esports | Unique Tournament

#Esports Gets a Shake-Up: ‘Ketsu Battler’ Tournament Requires Players to Compete with their Butts

A new fighting game is challenging the conventions of esports,demanding players utilize a unique – and unconventional – control scheme.

the Japanese developer Kayac has announced the first official esports tournament for its viral hit, Ketsu Battler, a 2D fighting game where players control characters battling with swords… using their buttocks.The tournament,set to be held at the GBVS Cygames Cup 2026,is already generating buzz for its unusual gameplay mechanics.

“The first official Ketsu Battler Tournament will be held at GBVS Cygames Cup 2026!! A maximum of 128 people can participate, and the best players will receive an autographed illustration card from Takade Naotaka!!” the developer announced on X on Thursday, December 18, 2025.

Did you know? – Ketsu Battler translates to “Ass Battler” in Japanese, reflecting the game’s core mechanic. Kayac initially created the game as an internal project to explore unconventional control methods.

How Does Butt-Based Combat Work?

Ketsu Battler, released for the Nintendo Switch in December 2024, quickly gained attention for its innovative approach to fighting games. Rather of traditional controllers,players attach a Joy-Con to their buttocks and use twerking movements to control their character’s sword swings. Opposing characters, ranging from samurai to ninjas and even gorillas, clash in a spectacle of hip-shaking action.

The game requires players to physically embody the combat, gripping or clamping the virtual weapons with their glutes. This unconventional control scheme has quickly made Ketsu Battler a viral sensation.

tournament Details and Registration

Registration for the tournament began on December 12 at 8 p.m.local time and operates on a first-come, first-served basis. As of this writing,only 46 players have registered,leaving 82 spots open for aspiring butt-based combatants. The registration window closes on January 17, 2026, at 7 p.m. local time.

The tournament will follow a knockout format, with each duel consisting of a best-of-three (Bo3) game scheme, except for the third-place match and the grand final.

Pro tip: – Mastering Ketsu Battler requires core strength and precise hip movements. Players are advised to warm up before competing to avoid muscle strain.

Prizes and Community Excitement

Winners will receive autographed illustration cards from Takade Naotaka, the author of the Ketsu Battler manga, along with other special prizes unique to the anniversary tournament. “1st to 3rd place winners will receive autographed illustration cards from Takade Naotaka… and other special prizes unique to this anniversary tournament will also be available,” explained a staff member from Granblue Fantasy Versus: Rising (GBVSR).

The emergence of Ketsu Battler and its esports tournament signals a willingness within the gaming community to embrace unconventional and playful experiences, potentially opening doors for further innovation in game design and competitive play.

Reader question: – Do you think this type of game could become a mainstream esport, or is it more of a novelty? Share your thoughts!

Why, Who, what, and How:

Why: Kayac developed Ketsu Battler as an internal project to explore unconventional control methods, leading to a viral sensation and demand for competitive play. The tournament reflects a growing openness within the gaming community to playful and innovative experiences.

Who: The tournament is organized by Japanese developer