Samurai Shodown IV: Amakusa's Revenge (Samurai Spirits: Amakusa's Descent (サムライスピリッツ天草降臨) in Japan) is the fourth installment of SNK's Samurai Shodown series of fighting games. Story-wise, it's the second and final chapter of a story between Samurai Shodown and Samurai Shodown II, with III being the first chapter.

mamuuuut chooses Kazuki in Rasetsu mode, where he can use a frame-perfect finisher as well as a button-mashing follow-up.