Golden Kamuy manga volume 6 features story and art by Satoru Noda.

Asirpa and Sugimoto are faced with a shocking truth—Noppera-bo, the criminal mastermind behind the stolen gold horde…is Asirpa’s father! To confirm this they decide to go to the impregnable Abashiri prison to attempt to meet him. Along the way they find more clues to the location of the gold, and make a stop in a hellish hotel. Meanwhile, Toshizo Hijikata and his band of death row outlaws expand their reach…