Poplar Publishing Co., Ltd. announced on Wednesday that Nakashiwo and Noriko Ueno's Nezumi-kun no Chokki (Nezumi-kun's Vest) picture book series is inspiring a television anime adaptation.

©なかえよしを・上野紀/ポプラ社
The picture books center on the titular mouse Nezumi-kun, who wears a signature red vest. The character featured in the Tobidasu Ehon 3D movie in 2010.
The book series began in 1974 with Nezumi-kun no Chokki, with the series now having 43 volumes with over 5 million copies in print. Nakashiwo writes the story, while Noriko Ueno, who died on February 28, 2019, drew the illustrations.
Sources: PR Times, Comic Natalie
This looks amazing! The weapon-based class system sounds so cool.
Glad you're excited! We can't wait to share more.