This very finely designed and executed porcelain yunomi (tea cup) with designs in blue was made by Matsui Koyo. Matsui Koyo is the son of the Living National Treasure for Nerikome or Neriage (marbled clay ware) wares, Matsui Kosei. He is considered one of the finest potters of the Nerikome style currently working in Japan. Due to demand and the time consuming method of creation, his works are always hard to find. The tea cup is 3 3/8” high and 3” in diameter. The artist name and seal are on the top of the original wood box and his name is on the bottom of the tea cup. It is in excellent condition.