Sugimoto and Asirpa (and Shiraishi too) have been reunited and head south across Karafuto with the goal of returning to Hokkaido. But after so much time apart and all that has happened, Asirpa’s feelings about the Ainu struggle have changed. Meanwhile, Lieutenant Tsurumi begins trying to decipher the code in the tattooed skins and sends a double agent into Hijikata’s group. But Hijikata is no fool, and engages in a battle of wits with Tsurumi. Regardless of who comes out on top, it is clear that only Asirpa holds the key to finding the Ainu gold. -- VIZ Media

The search for the tattooed convicts leads Sugimoto, Asirpa, and Shiraishi to the infamous Botaro the Pirate, a man with nearly superhuman swimming abilities. Tracking him down will test Sugimoto’s claim of immortality! Meanwhile, a serial killer stalks the back alleys of Sapporo—but is he another escapee from Abashiri prison, or someone else? The murders attract the attention of Lieutenant Tsurumi and Hijikata, and a deadly confrontation is building—but this time, who is the hunter and who is the hunted? -- VIZ Media

Asirpa’s adventure in Karafuto changed her feelings about not only her father, but also the Ainu struggle for independence. Sugimoto has come to realize something about his own feelings about Asirpa as well. If they’re really going to be equal partners, they’ll need to come to a new understanding. Once again on the run from Lieutenant Tsurumi, they head for Hokkaido. But the rogue officer isn’t about to give up. The pursuit once again leads into forbidding, frozen territory... -- VIZ Media

Sugimoto and Asirpa reach Lake Kussharo near Abashiri prison at last! The time has come to put all their plans to break into the prison and meet Noppera-bo into action. Their nemesis, Lieutenant Tsurumi, as always, is one step ahead and has his own agents inside Abashiri. Tsurumi himself is on the way, with a contingent of troops and a gunboat to back him up! But if anyone can survive being surrounded by enemies and still keep Asirpa safe in this deadly conflict it’s Immortal Sugimoto! -- VIZ Media

Sugimoto and Asirpa finally come face to face with Noppera-bo inside Abashiri prison, but as Asirpa looks into his eyes she realizes he is not her father! In the rush to escape, Anji Toni makes off with Asirpa, leaving Sugimoto and Shiraishi trapped inside, with Hijikata also set to betray them. Making matters worse, they’re all caught between Warden Inudo and his guards, and Lieutenant Tsurumi’s gunboat fleet on the river. With so much serious firepower being deployed, is anyone getting out alive? -- VIZ Media

On the trail of a hoard of hidden gold, Saichi “Immortal” Sugimoto and the Ainu girl Asirpa have already tracked down some of the escaped prisoners whose tattoos form a map to the lost treasure. But their search has caught the attention of a group of rogue Japanese soldiers from the legendary 7th Division. Their leader, the utterly cold-blooded and driven Lieutenant Tsurumi, will stop at nothing to find the gold. And Tsurumi is not the only formidable opponent Saichi and Asirpa must deal with—a former samurai who escaped with the prisoners is carving his own path to the loot. These enemies will put Saichi’s “Immortal” nickname to the test... -- VIZ Media

A tale of high adventure and survival! In the early twentieth century, Russo-Japanese War veteran Saichi Sugimoto searches the wilderness of Hokkaido for a hoard of hidden gold. With only a cryptic map and a native Ainu girl to help him, Saichi must also deal with every murderous cutthroat, bandit and rogue who knows about the treasure! Sugimoto and his friends head for Kushiro in order to escape Lieutenant Tsurumi’s pursuit. Meanwhile, Lieutenant Tsurumi himself leads members of the 7th Division to Otaru following rumors of the tattooed skins. Awaiting them are two of the most desperate and dangerous outlaws of the north—the Lightning Thief and his wife, the wicked Viper Ogin—and they’re both heading straight for Lieutenant Tsurumi!