Vintage Japanese Koishiwara Ware studio pottery yunomi (teacup) with original wooden tomobako. Handcrafted at an independent kiln during the Showa period (1926-1989), featuring a stunning natural tenmoku glaze with blue-black hare's fur effect and flowing white glaze at the rim. Koishiwara Ware is a nationally designated traditional craft from Fukuoka Prefecture, Japan, renowned for its handcrafted quality and wabi-sabi aesthetic. The piece is in excellent condition , and comes with its original wooden storage box.