Got to know the overall Japan population was < China population in the early 20 century. Why Japan could invade to big China continent with so many soldier troops??? Because Japan got a lot of Taiwanese/ Korean men by $$$ to be Japanese soldier during WWII at that time. I heard a the REAL JAPANESE family lived in Taiwan also tried to escape the war by running to my grandmom's home as a temporary shelter and did pay $$$ for them ( my mom's side when she was little). Taiwanese got more positive influence than China cuz the political control vs KTM leaded by Chang Kai Shei's in less speech freedom and strict control at that time. For me, I never went to China but mostly Japan. Now YT open, I love China more than Japan for the scenaries/ culture/ those geography locations I EVER studied when I was teenager. China got more stuffs to watch. But I learn the politeness from Japan tours.