If you loved One Million-Year Trip: Bander Book, try Bagi, the Monster of Mighty Nature
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

One Million-Year Trip: Bander Book
→
Try this next

Bagi, the Monster of Mighty Nature
What they share
Both films are directed by Osamu Tezuka, and they sit in Animation / Science Fiction / TV Movie territory. If that's the register that drew you to One Million-Year Trip: Bander Book, the second film will land in a comparable space — through a different lens.
What Bagi, the Monster of Mighty Nature is
The Island of Dr. Moreau if anime. A lab escapee with feline features finds a friend in a lonely boy. Years later, they meet again as Ryosuke investigates suspicious cattle deaths. Tezuka's oddball eco-parable is a product of its time.