Complex sentence: Hiroshi Mizuo argues that the best examples of shibusa are found in the crafts, which are ordinary objects made to be used; also, since they are mass-produced, they tend to be more spontaneous and healthy than many of the fine arts.
Split into simpler sentences: Hiroshi Mizuo argues that the best examples of shibusa are found in the crafts, ordinary objects made for everyday use. They tend to be more spontaneous and healthy than many of the fine arts.