[2] Sega Net Mahjong MJ3 was released and expanded the ruleset.

[2] Eleven years later after launch of the first game, Sega Net Mahjong MJ was ported outside of the arcade with a version on PC and mobile.

[4] A full English localization of the mobile version was also released, however was shut down.

[5] English and Traditional Chinese languages were available in the Japanese version, but were later dropped, besides the commentary.

It was also available on the free to play companion app of Yakuza 0 on PlayStation Vita.