A Golden Kamuy character. He is a Sergeant under Tsurumi Tokushirou's command in the 7th Division.
Tsukishima is a short but thickset muscular man, with dark hair shaved in a buzz cut, dark eyes, and stubble on his chin. His most significant physical traits are the two lines under his eyes and a short flat nose. Just like the rest of the 7th Division soldiers, he uses Arisaka type 30 rifle as a primary weapon and wears the standard Japanese military uniform (blue collared jacket, blue pants with gaiters, and kepi hat) and a white hooded coat or cape over it. Tsukishima is a very serious man, known for being diligent and dependable.
In his childhood had a friend called Igogusa.