Saitosha Co., Ltd. Announces Pre-orders for New Book "Hamuhon: The True Feelings of Hamsters," Latest in Popular "○○hon" Pet Book Series with Over 400,000 Copies Sold, Featuring Limited Edition IC Card Stickers.

Saitosha Co., Ltd., located in Bunkyo-ku and headed by Representative Director Kazunori Wakamatsu, has announced the commencement of pre-orders for its new publication, "Hamuhon: The True Feelings of Hamsters." This book marks the fifth installment and the latest addition to the highly successful "○○hon" series of pet books, which has achieved cumulative sales exceeding 400,000 copies. This release is the first in the series in five years. The book features illustrations by Megumi Fujimoto, known for the "Totonaku Kawaii Ikimono" children's book series, and is supervised by zoologist Tadaaki Imaizumi. It addresses 100 common questions regarding hamster behavior and psychology. The official release date is May 19, 2026 (Tuesday). The book is priced at 1,320 JPY (1,200 JPY excluding tax). It is a B6-sized publication with 192 pages and carries the ISBN 9784791633067. As a limited-time offer, special editions including an IC card sticker are available for purchase. These special editions can be acquired from participating bookstores nationwide, Rakuten Books, and Amazon. Specifically, purchasing the special edition of "Hamuhon" includes one "Hamuhon Special IC Card Sticker." A five-book set of the "○○hon" series also offers all five types of stickers.