Golden Kamuy: The Lightning Bandit and O-Gin the Viper / Shimaenaga

Golden Kamuy: The Lightning Bandit and O-Gin the Viper / Shimaenaga is an animated action-adventure with comedic elements, released in Japan in October 2025 and produced by Brain's Base. The film adapts two pieces of the Golden Kamuy story that had been left out of earlier animated adaptations: the Lightning Bandit and O-Gin the Viper arc and the Shimaenaga, or Little Bird, chapter. The result is a self-contained episode that fills in material fans of the series had not previously seen on screen, set in the same adventure-driven world as the rest of the franchise.

Shizutaka Sugahara directed the production for Brain's Base. The film's Japanese release places it within the ongoing animated treatment of the Golden Kamuy saga, arriving after the earlier adaptations and presenting two previously skipped segments of the source material together in one feature-length OVA. Beyond the director and studio, the available credits offer no further production or cast details.

The film runs in the action, adventure, animation and comedy genres, following the series' usual blend of rugged adventure and humor. Its release in October 2025 brought the Lightning Bandit and O-Gin arc and the Shimaenaga chapter to viewers who had followed the animated adaptation up to that point. No box office, budget or rating figures are part of the record for this title, so its reception rests on the release itself rather than measured performance.