Specialty. Korean tea bowl, blue well. The name may have been given to this bowl to indicate that it was rare in the past. It has a blueish-white color with a width of about 22 to 33mm around a third of the circumference of the mouth, and has a serpent scorpion glaze-like color of Kureware tea bowl, Koshimizu Choshi Ban Kokin Ido . This is a characteristic of Kokin Ido, and is unique among other well bowls. It was handed down from the Yakura family of Kyoto to Kibei Kunimatsu in Kyoto by Kitaro Matsuyama, a tool merchant in Ishikawa Prefecture, in the early Meiji period (1868), and later returned to Ishikawa Prefecture in September 1894 (Meiji 27), where it went to the bidding of Bunji Jomori in Ishikawa Prefecture and became the property of Isaku Oka in Kanazawa. (Taisho Meikikan)