This is a Japanese B2 Poster (20.3" x 28.7") for the 1967 Japanese theatrical release for a "Toei Manga Festival" (Toei Manga Matsuri). The Toei Cartoon Festival (東映まんがまつり, Tōei Manga Matsuri) is a festival established by Toei Animation in 1967 as a way to showcase their popular children's series as theatrical films during seasonal breaks in the school year (spring vacation, summer vacation, and winter vacation).