ALOT. Most Japanese-Chinese are Southern Chinese. Its only recently that there are Mandarin speakers immigrating to the country as international students. I wonder why tho. I think Cantonese are very apt to travel abroad eh? They succeed really well abroad too, i notice. In Southeast Asia the Southern Chinese (Teowchew, Hakka, Cantonese) are the elites there. I think in the West too, the pathfinders were always the Southern Chinese. Interesting right?
@Chinese-Dragon , do you know the reasons for this? Do they mention anything in Chinese history about this?