Youseiou(1977)

Youseiou

A boy named Jack moves to his family's historical home in Hokkaido from Tokyo because of an illness. But unbeknownst to Jack this house, and his ancestor has a deep connection to an alternate world of fairies, the land of Nymphidia, populated by creatures from various legends and folklores. This world is under threat from the dark elf Queen Mab and her destructive ambition. It will be up to Jack and his new allies, the hero Cú Chulainn and the little satyr Puck, to save the fairy world of Nymphidia.

Also contains: Ochikubo Monogatari (落窪物語), and Dream (ドリーム)