Mahjong Sword: Princess Quest Gaiden is a Mahjong video game developed and published by Naxat Soft for the TurboGrafx-16/PC Engine System in 1995.

It is a censored port of the PC-98 game, "Mahjong Sword: Princess Quest" which was released a few months prior and the game is an off-shoot to the quirky PC-98 Board / Card RPG, "KuruKuru Party: Princess Quest"