The official Twitter account for the anime film adaptation of the picture book Riku wa Yowakunai by actor/author Shinobu Sakagami and illustrator Kunihiro Kawashima (also known as Cookie! of comedy duo Yasei Bakudan) revealed more cast members for the film on Friday.
Based on Sakagami’s own life, the story follows the carefree daily lives of a 5-year-old and a puppy named Riku.
Sakagaki and Kawashima published the picture book in April 2020, and as of this month, the book has over 22,000 copies in circulation.
In addition to the Italian greyhound Riku, the characters include the chihuahua Tsutomu, the miniature dachshund Yōsuke, the French bulldog Maruchan, and the pug Paguzо̄.