Perhaps, but it's been the state of the world in the DCU for decades.
One of my many problems with DC, to be perfectly honest.
In the DCU, the first Superheroes canonically appeared in America; superheroes apparently appear in the US at a much higher rate than pretty much anywhere else (up here in Canada, we canonically have exactly 1, for example); and the most public ones (the ones, for instance, who zip around the world stemming disasters everywhere) operate out of the US.
And a swatch of pro-wrestling style foreign villains. Don't forget about them.
Superheroes in Japan, in the DCU, where they actually hear about American heroes, would not develop in a totally different direction, as the fiction did, with the two nations takes on the concept developing in near total isolation.
...Your assumption about how American and Japanese heroes developed in the real world for comparison is fundementally flawed. One of the earliest Japanese heroes drew almost exclusiely from American influences: Moonlight Mask.
Again, look to the pop and rock music scenes for what superheroes in DCU Japan would really be like, not superheroes in fiction.
Why yes, they don't have cover bands or impersonators last time I checked.
The closest thing they have is something called Animetal which is metal covers of Anime theme songs.
A rather bizarre nitpick, being both inconsequential, and within this context, incorrect.
Its literal meaning is not it's actual meaning when used in English, just like 'anime' doesn't just mean 'animation', unless you're Japanese or French - it refers to Japanese live action entertainment of a sf/fantasy/horror bent.
Not from my research. It applies only to Special Effects, nothing more. Audition--a very creepy J-Horror film has no special effects at all.
Furthermore, Manga/Anime does just refer to comics/animation last time I checked around. I could be wrong, mind you, but that's what my research has shown.
Yes, but that doesn't really change the equation one way or the other.
Again, I disagree. The same events can be lensed differently through different perspectives.
In a word: Rashamon.
If the aesthetics are all that's different, why should the aesthetics be different in the same way as in the superhero fictions of the two nations, not in the same way as in the reality of the two nations?
Media is often the best way to see how a nation views itself.
Let's take a transforming hero...why would Japanese transforming heroes of this type look like Sailor Moon or the Zyurangers, when Western types look like Etrigan or Monster Girl?
Newsflash: Not all do.
You want an Etrigan analogue: Devilman fits almost perfectly in several of his iterations.
You don't have the knoweldge base to argue this effectivly. I sugest giving up while you're ahead.
Why would a team of science based ones go with a Goranger look, rather than having fully armoured forms? Or bestial? Or pseudo-military, for that matter.
Well, I did explain about Japan's sword/gun laws didn't I? And their overall desire for uniformity within society?
Japanese superheroes, whose aesthetics aren't at all informed by American heroes also wouldn't likely tend toward magical girls, Super Sentai, or henshin heroes - they'd be more likely to draw from Japanese culture the same way that Western superheroes draw from theirs - there'd be people dressed as samurai, mikos*, ninja, oni, kitsune, or other yokai, fighting monks, etc.
Who is a better commentator/designer for what heroes from a certain culture would be like, you or the culture in question? The answer should be obvious.
That said, there are superhero Samurai, miko, ninja, bakemono, monks and so on.