Gakken, a group company of Gakken Holdings Co., Ltd. (Shinagawa, Tokyo / President & CEO: Hiroaki Miyahara), released the digital book Osu Shikamen Salmon Uchuu Ninja-hen 2: Nazo no Kunoichi to Wana Darake no Karakuri-jou on January 30, 2026.
The Osu Shikamen Salmon series is a reading series for elementary school students featuring various play elements such as riddles, spot-the-difference puzzles, puns, puzzles, and mazes. Six volumes have been published in print format so far. The series is now continuing with new digital releases published irregularly.
In the latest story, the justice hero Osu Shikamen, who defeated unique space ninjas modeled after ramen and refrigerators, faces new enemies. Magic Inchiki, also known as Osu Shikamen No. 2, appears in place of injured comrades. However, space ninjas and mysterious kunoichi characters set up various traps in front of the Karakuri Castle. Watch how the two Osu Shikamen heroes overcome these elaborate traps. The story includes a thorough recap of previous episodes, so readers can enjoy it even starting from this installment.
Don't miss the new transformation form of Osu Shikamen (Sushio) that appears in the latter half of the story.
Recommended Features
Funny Characters and Entertaining Story
The series features unique and charming characters, including the protagonist with a salmon sushi topping head, the kappa Macky, and Magic Inchiki who transforms into Osu Shikamen No. 2.
Packed with Play Elements Like Mazes and Puns
The story includes maze pages that children love, making reading enjoyable and engaging. Don't miss the spot-the-difference page where readers must see through the mysterious kunoichi's shadow clone technique.
About the Authors
Tokio Domon Profile
Born in Tokyo. Member of the Japan Cartoonists Association. In addition to manga, he writes children's books including riddles and mazes. Recently also works on rakugo and manzai scripts.
Author of Nazonazo 1-nensei, Oekaki Puzzle (both published by Gakken), and many other works.
Takao Kawasaki Profile
Illustrator and manga artist. Born in 1975. From Kanagawa Prefecture, residing in Tokyo. Works include the manga Machiboke Shinshi (Seirinkogeisha) and illustrated picture book Gum no Yousei, written by Warai-meshi (Iwasaki Shoten).
4-Panel Comics and Stories Available on Gakcomic
Original 4-panel comics of Osu Shikamen Salmon and parts of previous stories are now streaming on Gakcomic, a manga site operated by Gakken.
Readers can learn fun facts and trivia about sushi toppings and fish while reading the comics and stories.
About Gakcomic
Gakcomic is a free manga site designed for both children and adults to enjoy, with the catchphrase "A Manga Site That Moves Hearts and Expands Worlds."
The name Gakcomic embodies the wish for this site to become a community where people discover works that grab their hearts and won't let go.
Gakken Manga & Gakcomic Editorial Department Official X (formerly Twitter) Account
https://twitter.com/g_manganichirek
Product Details (Digital Book)
Osu Shikamen Salmon Uchuu Ninja-hen 2: Nazo no Kunoichi to Wana Darake no Karakuri-jou
Author: Tokio Domon, Illustrator: Takao Kawasaki
Suggested retail price: 550 yen (tax included)
Release date: January 30, 2026
Pages: 41 pages
ISBN: 978-4-05-923584-2
Publisher: Gakken Co., Ltd.
Purchase Links:
- Kindle: https://www.amazon.co.jp/dp/B0GKF2R5XL/
- Rakuten Kobo: https://books.rakuten.co.jp/rk/cc019a850b133aa7b5b7e8cbee422e81/
Uchuu Ninja-hen 1 (Digital Book) Also Available
Osu Shikamen Salmon Uchuu Ninja-hen: All Star Kiseki no Kaisen-don!
Author: Tokio Domon, Illustrator: Takao Kawasaki
Suggested retail price: 550 yen (tax included)
Release date: November 10, 2025
Pages: 41 pages
ISBN: 978-4-05-923431-9
Publisher: Gakken Co., Ltd.
Purchase Links:
