If you're looking for anime similar to Golden Kamuy Season 4, you might like these titles.
The stage is Sapporo, Hokkaido. One night, our heroine, Minare Koda, spills her heartbroken woes to a radio station worker she meets while out drinking one night. The next day, she hears a recording of her pitiful grumbling being played live over the air. Minare storms into the station in a rage, only to then be duped by the station director into doing an impromptu talk show explaining her harsh dialogue. With just one recording, the many eccentric facets of Minare's life begin to pull every which direction as she falls ever deeper into the world of radio.
In present day Japan, during what should have been a routine training exercise, Captain Umeza and the battleship Mirai are suddenly hit by a storm, sending them back in time to the middle of World War 2. Armed with state-of-the-art technology, the Mirai could alter the course of history; but for its crew, the situation presents a moral dilemma: do they have the right to meddle with history, even to stop the most dreadful tragedies of the war, when even the smallest acts could have unforeseen consequences?
Legends tell that while Japan was at war, the army stashed their treasure underground amidst Edo-era passages and war-time trenches. Ryuhei, Yoshio and Shun are chat room friends who decide to explore the underground and hunt down the treasure, and they have a good head start: Ryuhei found his father’s old secret notebook filled with detailed maps and hints! Along with Ryuhei’s little brother and the secretive ‘Mr. Acid Rain’, the children will scour the pipes and rat-infested tunnels of the underground in search for good fortune, meeting an eccentric cast of characters and an old war veteran along the way.
The Cockpit tells three different tales from the second world war, bound together by the madness of war --and airplanes. In the the first tale, a German pilot is forced to choose between his duty and his soul; the second is a tragic tale of a Japanese kamikaze pilot who welcomes death; and finally, the third tale revolves around two Japanese ground troopers in the Philippines who are racing towards an airbase that might already be under enemy control.