TamagawaSoft’s isekizima: Ruins and Tails Journey is a side-scrolling action platformer about Kijino, a cat-eared nekomata adventurer exploring ancient ruins reclaimed by forest. The game is planned to launch on Steam for Windows PC on January 19, 2027, at $17.99 / ¥2,250. A Nintendo Switch version is also confirmed, but its release date has not been announced.
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Release date, price and platforms
The November 10, 2026 announcement set the Steam launch for January 19, 2027. TamagawaSoft also confirmed a Switch version for a later release, without specifying when it will arrive.
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The planned Steam price is $17.99 in the United States and ¥2,250 in Japan. A free Steam demo offering more than an hour of play is available ahead of launch, according to Famitsu.
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A folklore-inspired journey through forest ruins
Players take control of Kijino, a nekomata—a two-tailed cat spirit from Japanese folklore—as they travel to Isekizima and explore ruins buried in the forest. The setting includes woodland paths and caves beneath the island, with music composed to suit the scenery of different areas.
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The adventure spans more than 30 stages. Its side-scrolling platforming includes dashing, dodging and triple jumps as Kijino makes their way through the ruins.
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What to expect from the challenge
The available details describe options intended to accommodate different play styles. GamesBeat reports three optional challenge settings, including fiercer enemy attacks and a limit that keeps maximum HP at its starting value. It also reports 47 Steam achievements, among them reaching the goal without defeating enemies.
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TamagawaSoft has described an eight-year development period for the game, according to Famitsu.
1 The outlet also reports that the demo is already playable on Steam, giving players a chance to try the adventure before its scheduled release.
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What’s still unknown
The Switch version’s launch timing remains unannounced, so the January 19, 2027 date applies to the Steam release—not a confirmed simultaneous launch on Nintendo’s console.
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The confirmed details point to a folklore-inspired platforming adventure built around forest-covered ruins, more than 30 stages and a folk-music-led atmosphere. Players can sample the demo now, while the final Switch date is still to come.
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