Lord Lakely
Idea Fountain
The reason why Korea is always portrayed as a Science Civ is because they are the best choice for one from that reason. China is a scientific powerhouse but known for other things as well (heavy industry, agriculture, high population, expansion, warfare, wonder building, strongly developed culture). Other nations from that part of the world, like Japan and Indonesia aren't specifically sciency; Korea is though, so they're relegated that role.
The alternative is making them a defensive cultural Civ with a penchant for navies and late-game science, but that is a niche which suits Japan a lot better imo.
The alternative is making them a defensive cultural Civ with a penchant for navies and late-game science, but that is a niche which suits Japan a lot better imo.