>>49939860>The Japanese ones just look like they've been eroded, as though they've been stored in poor conditions for a long time, they probably weren't that bad when they were made.Nah, those were intentionally made like that.
Though Japan was also making normal porcelain, Japanese people found those "eroded" and asymmetrical ones attractive (Wabi-Sabi culture) partly because those tended to have an accidental color and shape, and thus you could have only one piece. Preferring a humble style is one of characteristics of Japanese culture.