Kerokko Demetan (English: Demetan Croaker; Demetan, the Boy Frog) is an anime series produced by Tatsunoko Production and developed by Tatsuo Yoshida. It follows a tree frog called Demetan, who migrated with his army family to Rainbow Pond after his siblings were tragically eaten by a salamader. There, he fell in love with Ranatan, daughter of Rainbow Pond’s leader. Both Demetan and Ranatan spent their adventures fighting for a change to save Rainbow Pond from conflict.

It premiered during the Winter 1973 season on Fuji Television and lasted 39 episodes. It was later adopted as an animated theatrical film produced by Harmony Gold known as The Brave Frog in 1985. It is considered one of Tatsunoko Production’s famously underrated works.