Korasho no Kaitei Wakuwaku Daibouken!

A character named Korosho, representing the spirit of a ransel backpack, originates from Benesse's "Shinken Zemi Shogaku Kouza" educational correspondence course for young elementary students. The film is the result of a collaboration between this educational program and the Japan Agency for Marine-Earth Science and Technology (JAMSTEC), alongside Team Kuroshio, a group of researchers and engineers focused on exploring the ocean floor.