The Brave 'Yoshihiko'

The story is set in an ancient time, when the whole country was covered in thick forests. A mysterious plague breaks out, resulting in countless deaths. A pure young man named Yoshihiko becomes chosen as a hero, and he sets out on a journey in order to save a village. He has two goals – to bring back the legendary plant that can cure the plague, and to rescue his father Teruhiko who left to find the plant but never returned.

Seasons

and the Devil King's Castle

Episodes: 12

and the Key of the Evil Spirit

Episodes: 11

and the Seven Chosen Ones

Episodes: 12