Toshio Ozu

In "Kengan Ashura," Akemi Soryuin invites Hibiki Sakura and the others to her home to train when gyms and public facilities are temporarily closed. To help with training without specialized equipment, she provides her sister Shion's book as a reference. The book, titled "Read with Muscles: Encyclopedia of Body Part-Specific Training," includes an author photo and a special gravure section featuring Toshio Ozu, as well as various creative additions. Additionally, there is a supplementary training instruction DVD starring Toshio Ozu, who is introduced as being 42 years old. Toshio Ozu is also known for authoring books such as "Studying English Literature through Muscles."