The businessman Yamamoto Naoyoshi started Mikasa Hotel in Karuizawa, Nagano in 1905 and invited Miyagawa Kozan from Yokohama to start a kiln and produce souvenirs for summer visitors. The kiln was then handed down to Kozan’s apprentice Idaka Kokei (later Idaka Kizan) and again to Kozan’s apprentice Mori Koshu of Mushiage ware but was abolished around the early-Taisho period.
