Also no

1. It's a Manga
2. About the ecosystem in a recently popular location/setting in fiction
3. The most efficient way to deal with obstacles is to eat them.
4. also known for its headstand of denial (See pic)
5. Hot Pot
6 Literally Dungeon Food

I feel bad for merely guessing (ie, haven't read it), but this hint...hah. Is it Dungeon Meshi?

YES!

Okay, slightly more obscure than Kemonozume. Please tell me if you manage to reverse search it.

I wouldn't call it obscure, maybe just the genre, but its manga did win a couple of awards and there were some controversies off-screen too.

I had MAL viewership numbers in mind, rather than its notoriety in Japan. As far as I know, there isn't an official English translation of the manga, and the fan scanlation is far behind. Perhaps "obscure" is a poor word choice - "less popular"?

Yeah, I don't check MAL that much but I can understand why it might be lesser known or liked outside Japan. I just can't help but mention the controversies because it caused quite a stir back then. :)

Another screenshot.

I hate it when I clearly remember having seen something, but having no clue when, where oe what it was.

Perhaps a(nother) hint? Tea ceremonies are a big thing.

Correct :) Your turn.

Next, this one shouldn't be so obvious like last time.

GTO, duh.

A fucking classic, btw.