Zeikin de Katta Hon

• Ja Kanji — 税金で買った本 • Genre — Comedy

• Type — manga • Author — Zuino • Illustrator — Kei Keiyama • Publisher — Kodansha • Imprint — Young Magazine KC Special • Magazine — * YanMaga Web • Weekly Young Magazine (2021–present) • First — August 16, 2021 • Volumes — 20

• Type — drama • Director — * Hiroyuki Muramatsu • Tomoki Sakanashi • Writer — Riko Sakaguchi • Music — Kei Yoshikawa • Studio — NHK Enterprises • Network — NHK General TV • First — August 24, 2026 • Episodes — 32

• Type — tv series

• Portal — yes Zeikin de Katta Hon is a Japanese manga series written by Zuino and illustrated by Kei Keiyama. It started in Kodansha's online platform YanMaga Web in August 2021, and was later transferred to the publisher's manga magazine Weekly Young Magazine in December of that same year. A live-action television drama adaptation premiered in August 2026, and an anime television series adaptation has been announced.

The story follows Ishidaira, an unruly student who, after discovering a love of books, comes to work at a library. Along with his senior coworkers Hayasemaru and Shirai, he solves problems such as damaged books and the mysteries behind them.

• Kiichi Ishidaira • Daiken Okudaira • A high-schooler, whose delinquency and belligerent attitude belies his natural inquisitiveness and love of learning. Eventually comes to work part-time at the library. • Sayaka Hayasemaru • Nanase Nishino • A librarian, who sets down Ishidaira on a path to (re)discovering his love of reading by prompting him to reimburse a borrowed book he had lost. She is passionate about her work and acts as Ishidaira's (and by proxy, the reader's) guide to the inner workings of a public library. • Satoyuki Shirai • Macho Aoki (Kakeochi) • Another librarian, who works closely with Hayasemaru. Originally physically weak, he bulked up in order to better respond to threats and complaints towards the library and his co-workers. His assertiveness is often utilized to deal with uncooperative patrons. • Asako Asano • Sayaka Isoyama • Hotta • Akira Kawashima (Kirin (comedy duo)) • Kiichi no Chichi • Hiroyuki Hirayama • Ryoko Ishidaira • Akiko Yada

Written by Zuino and illustrated by Kei Keiyama, Zeikin de Katta Hon started in Kodansha's online platform YanMaga Web on August 16, 2021. The series was later transferred to the publisher's manga magazine Weekly Young Magazine on December 13 of that same year. Kodansha has collected its chapters into individual tankōbon volumes. The first volume was released on December 20, 2021. As of August 6, 2026, twenty volumes have been released. An official guidebook was released on May 6, 2023.

A live-action television drama adaptation was announced on February 28, 2026. The series is directed by Hiroyuki Muramatsu and Tomoki Sakanashi, with Riko Sakaguchi writing the scripts and Kei Yoshikawa composing the music. It premiered on NHK General TV's Yoru Dra (Evening Drama) programming block on August 24, 2026, and will run for 32 episodes.

An anime television series adaptation was also announced on February 28, 2026.