The Adventures of Tom Sawyer
Capturing all the fun, adventure and life lessons of the classic Mark Twain novel, the series follows the imaginative and mischievous boy, Tom Sawyer, and a colorful cast of characters living in the small river town of St. Petersburg, Missouri.
Starring Masako Nozawa, Kazuyo Aoki, Keiko Han, Ichirō Nagai, Ikuo Nishikawa, Kaoru Kurosu, Kaoru Ozawa, Naoki Tatsuta, Natsuko Kawaji, Sumiko Shirakawa
Watch "The Adventures of Tom Sawyer" from streaming services Tubi TV, Amazon released in 1980. It's a action & adventure and animation show, and has a rating of 8 out of 10 from Imdb which is usually fine for this kind of show, and is currently available to watch for free.