Don Chuck Monogatari

Don Chuck Monogatari is a Japanese anime television series consisting of 26 episodes. It was followed by Shin Don Chuck Monogatari. It was directed by Kazuyuki Okaseko and Kouzo Takagaki and first broadcast on Tokyo Channel 12 in April 1975.
Don Chuck is the name of the mascot character for Tokyo Dome City Attractions.
The series contains profound lessons in courage, patience, loyalty, and other human values.

Plot

Don Chuck with his father Don Aristotle, are beavers who live at the house on small island in the river, that flows through the heart of Zawazawa Forest. Chuck's father worries about his motherless son, who is especially concerned about his growth, but the mischievous Chuck lives a carefree life with many friends, including Lara, a playful beaver girl, Mimi the rabbit, and Daigo the little bear. Through his interactions with his friends and his father, and his adventures in the forest, Chuck gradually grows up.