Attracted by the fun and enjoyment of fishing, Sanpei, an ordinary boy, tries all kinds of fishing. He sometimes travels deep into the mountains in search of a novel catch, and even goes abroad to compete with others in a series of games. Sanpei takes on all challenges with the passion and imagination of a young boy. Through fishing, he learns the wisdom of older people, and experiences the wonders of the underwater world. Source: nipponanimation.com/catalogue/032/