A Yasuji Murata version of the classic Japanese story Saru Kani Gassen.
NOTE FOR MODS: please read this post https://myanimelist.net/forum/?topicid=1510673&show=1350#msg50309895
(also totally unrelated but can you change https://myanimelist.net/anime/35388 the main title from "Ame ya" to "Ame ya" I instinctively hit space as if it was the particle yo よ.)