Most Japanese are Korean

so why do they insist on thinking that Japan is a homogeneous nation? It is a well established fact that the Yamato dynasty originated from Korea. Also it is widely known that the Japanese stole the Kanji from the Koreans who in turn had stolen them from the Chinese.

So then does it matter if the Japanese stole the Kanji from the Koreans or the Chinese? Korea doesn't even use Kanji anymore, they did away the Korean Hanja. koreans and Japanese people may both be Asian, but they are easily distinguishable from one another. I'm not entirely sure on whether or not you're bullshitting, but someone is only a different ancestry if it's not hundreds of years and you look like the ethnicity to claim to be. Koreans have tanner skin and wider faces, with generally less slanted eyes. Japanese people are paler, with more gaunt faces and quite slanted eyes.

It does matter because the Japanese claim that they are homogeneous as a race. Also Hanja are still used in Korea and Korean students are taught a total of 2000 Hanja from 1st through 12th grade.

They might be taught them academically but at home there's only a small fraction of Koreans that learn the Hanja from their parents. the Jamo is really advocated in Korea.