You absolutely aren’t wrong but it is a big step away from the comparison to spaghetti westerns. Avatar or RWBY is an American shonen in the same way that A Fistful of Dollars is an Italian western. Marvel is an American shonen in the same way that Seven Samurai is a Japanese western. In the former while some stylistic differences appear you could easily not be aware of the nation of origin until you learn the stylistic differences. In the latter you can’t mistake it. Seven Samurai is drenched in Japan like marvel is drenched in America. It’s easier to watch seven samurai and not know it’s a western than to not know it’s Japanese.
Since anime was inspired by Disney and other western animation wouldn’t they be called “sushi cartoons” in this naming scheme? The superhero genre is older than the whole anime industry after all.
Not sure where you got this from... Most Animes are based on Mangas (comic books). And they existed long before Disney.
Choju-giga
What many believed were the very first manga in Japan appeared in the 12th and 13th century, in a series of drawings like frogs and rabbits titled Choju-giga (Scrolls of Frolicking Animals) produced by several artists.
Disney was founded on October 16, 1923, by brothers Walt Disney and Roy Disney as Disney Brothers Studio
If you count anime as any animation from Japan then no. From my research it looks like the first animated Japanese film was a propaganda film released in 1945.
If you consider the aesthetic commonly known as “anime” today then yes because the first Superman cartoon came out in 1966 while “modern anime” had it’s begins in the 70s.
Although hamburgers and hot dogs are from Hamburg and Frankfort, respectively.
They were actually both invented in the USA. Germany had similar dishes (e.g. whatever meat or fish available in a bread roll), but they aren't quite the same. Seems like it's a bit of a Döner / Kebab story.
Europe had mastered the pastry when the US was just getting started, so they had strudel and hand tarts and stuff. Brits made cobblers, brought to the US. Brown Betty was invented here.
We could call them gridiron wuxia movies (such as Star Wars ) since gridiron football is a weird American thing.