> Go into a 7-11 in China or Korea, and the prices are often written by hand. In Japan, they're the same printed font everywhere.

Definitely not. I don't know if you live in Japan or not but the stuff I see walking around my neighborhood has plenty of stylized, varied, and even handwritten fonts and signs.

EDIT: Here's an example picture from google maps of a random corner (the first one I found, didn't have to look much): https://upload.i.ng/file/interpolatesdisarrangesocioeconomic...