How thin do you want to stretch it? Dragonball is based on the old Chinese myth of Journey to the West. Neon Genesis Evangelion is based on Christian myths.
I mean this as politely as possible but you thought a man name Goku, who won martial arts tournaments through deceptive techniques, had a monkey tail, transformed into an ape, used a magic cloud as transportation, and had an extending pole as a weapon was unrelated to Journey to the West?
Natsume's book of friends has a lot about yokai and stuff, not as much mythology
The tale of princess Kaguya (one of my favorites) is a version of the old Chinese tale of the bamboo cutter
Ghost stories (English dub only - I promise) but it's any ghost stories
Heike story - I think, follows a girl who plays the biwa and can see the future, more historical
Theater of darkness - a collection of scary stories that would have their origins in myth
Kyousougiga - a story about love, reincarnation, very Japanese myth. Hard to explain but one that I loved
Thunderbolt fantasy - actually puppets, physical puppets. But more Chinese myth than japanese. It was actually a good story too
Maybe kamisama hajimemashita - a girl becomes a shrine god, a rom-com
Mushi-shi - one of my favorites, there are these spirits called musho that are more like energy and the foundation of life. They can cause issues in the world and the MC is like a physician or detective
Depends on how freely you assign historical tales mythical status, but Vinland Saga contains a lot of influence lifted directly from actual Viking stories like the Greenlander Saga.
There's enough of the fantastical in both the historical sources and in the adaptation that I think it qualifies as an adaptation of folklore, if not myth.
Well depends on your standards. Saint Seiya is one that comes to mind, because I'm old, but as with most animes the plot has hardly anything to do with actual myth. It's just characters based lightly on mythical characters.