>>108314649Mandatory art classes in all schools nationwide at a younger age. Those classes focus on draftsmanship and fundamentals over self expression, and emancapatory politics the way American art classes are more likely to.
Higher cultural priority on precision and copying, as opposed to self expression and originality.
Higher population density and the junior and high school club system means peer groups to support aspiring artists. There may be great artists in bumfuck idaho who we'll never see except for online, where they could be anyone.
More support for pro-am commercial work in Japan, so you get more people selling shit and being visible that way. The artist alley people in america can't do merch and can't advertise without getting a faceload from the big D.