Ushiyama the Undefeated is the 53rd chapter of Golden Kamuy.
Shiraishi tries to warn Ushiyama about Ienaga but, Ushiyama refuses to listen. Ushiyama breaks them out of the room. Meanwhile, Sugimoto saves Ashiripa from Ienaga who was after Asirpa's eyes. Shiraishi reaches infront of the room and tells Sugimoto who Ienaga truly is. Ienaga manages to escape but Ushiyama goes after him. When Ienaga almost got surrounded she mentions to Sugimoto that Ushiyama is a tattooed convict and both begin to fight.