The OVA Golden Kamuy: Tsurumi Tokushirō no Shukugan contains two distinct anime segments bundled with the official spin-off novel of the same name. The first and main segment adapts the popular manga chapter The Lightning Bandit and the Viper Ogin. Set in Hokkaido during the early Meiji era, this story follows Saichi Sugimoto, a war veteran known as Immortal Sugimoto, and his Ainu companion Asirpa. Their search for a hidden stash of Ainu gold brings them into conflict with a cunning criminal known as the Lightning Bandit and a dangerous woman named Ogin, whose venomous methods make her a formidable adversary. The second, shorter segment is a comedic mini-episode titled Shimaenaga, which features the series characters interacting with the small, fluffy long-tailed tit birds. The narrative focuses on the ongoing struggle to decipher the tattooed maps on escaped convicts from Abashiri Prison, a conflict that forces Sugimoto and Asirpa to confront new rivals while deepening their partnership.