The Japan Folk Crafts Museum was established by a well-known craftsman and scholar Soetsu Yanagi(柳宗悅) in 1936. He was known as the William Morris of the East who found aesthetics in everyday ordinary and handmade utilitarian objects. His book "The unknown craftsman" is a good start to understanding Japanese craft philosophy. It is also worthy to visit this warm and cozy museum if you want to know more about Japanese crafts. It will take 1-2 hours for touring.
Here is the museum website: http://www.mingeikan.or.jp/english/