>>7628538
Anime and manga on the other hand have a completely separate origin point.

>Disney
Osamu Tezuka, the founder of anime and manga more or less, is heavily inspired by Disney, he creates his own comics in that style
>Copycats
Seeing the success of Tezuka, a bunch of others begin making their own comics inspired by it, it all looks very similar to Astro Boy, very cartoony
>Push for edginess
These manga fans have now grown up and want to tell more serious stories, Tezuka himself follows suit and produces works like Black Jack, pic unrelated.
The style becomes more realistic but is still largely inspired by that earlier cartoony era