I live in Japan. 99.9% of them are unaware of their situation. I've seen some rare cases online where the guys will wonder why some teenage "bad boys" have gfs but they don't. I don't think they will ever reach the English incelosphere conclusions about the blackpill and lookism, because the dynamics there operate on different levels.
They're ignorant of terms like : hybristophilia, hypergamy, etc.
Also the forums with Japanese incels tend to be racist towards other Asians but totally ignore the mayos who slay. This is reflected by how they are in real life in general. They hate Chinese and Koreans (who are beyond incel), even the women, but do not see any problem with a 50 year old white guy fucking their women. They have a cucked mentality that I can't even explain.
The other problem is inceldom here is not only looks related. In Asia in general, noodles want an Asian super betabux. Someone who earns a lot, has a good career, a stable job, a car, a flat, etc. so the noodle can stay home and leech off the beta, which is impossible since women have entered the workforce.
The sushi sluts tend to hate koreans, chinese and other asian groups too. So a super beta buxx even if he looks Chang-like will not slay in here. The racism is a huge barrier IF you are Asian.
But they will date a bald mayo who is jobless, doesn't speak Japanese etc. You still need to be very tall. I've seen short mayo incels who tried to slay and got depressed beyond imagination. I don't know what's in the food, but plenty of noodles are taller than the men here.
EDIT : because the dynamics operate differently and 99% of japanese incels can't speak English, they're stuck in limbo, never reaching the conclusions from the English incelosphere. Another problem is the internet is worse than Europe. Some guys got jailed for 3 years for uploading some manga online. Talking about some Japanese ERs will probably get him locked forever