SegaNET Mahjong MJ is currently running the Sumasuro Bakemonogatari CUP national tournament, which started July 13, 2026, and runs through August 2, 2026, across app and arcade versions. The game recently hosted the Hihoden CUP tournament starting June 22, 2026.
SegaNET Mahjong MJ has been running a series of collaboration tournaments that tie its online mahjong platform to other Sega properties. The Hihoden CUP, launched on June 22, 2026, was the first time the game partnered with the Hihoden series. That tournament offered SP characters, table backgrounds, and winning effects as rewards, and players competed in East Wind Round and Three-Player Mahjong categories for total score. The event ran across both the app and arcade versions of the game.
On July 13, 2026, Sega started a second collaboration tournament, the Sumasuro Bakemonogatari CUP, which runs until August 2, 2026. This event uses Sega's own mobile puzzle game Sumasuro Bakemonogatari as the collaboration partner. It also spans the app and arcade versions, with rewards including characters, backgrounds, and win animations. The tournament is a national competition, following the same cross-promotion format as the Hihoden CUP.
Both tournaments represent Sega's strategy of using its existing game properties to drive competitive play in SegaNET Mahjong MJ. The game continues to receive live-service support through these limited-time events, with each collaboration offering exclusive themed items to players.
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Sega has started a collaboration event between its online mahjong game SegaNET Mahjong MJ and the mobile puzzle game Sumasuro Bakemonogatari. The Sumasuro Bakemonogatari CUP national tournament runs from July 13 to August 2, 2026, across app and arcade versions, with collaboration items including characters, backgrounds, and win animations as rewards.
Sega launched the Hihoden CUP national tournament for Sega NET Mahjong MJ on June 22, 2026. The event runs across the app and arcade versions, offering collaboration items including SP characters, table backgrounds, and winning effects themed after the Hihoden series. Players compete in East Wind Round and Three-Player Mahjong categories for total score.