A set of two Bizen-yaki tea bowls. There is a maker's mark of "Mu". I am not a specialist or appraiser, so I cannot make a definitive statement, but I believe the "Mu" signature is likely that of Heizan Okamoto. However, this is not a definitive identification, so please examine the photos provided and make your own assessment. - (Heizan Okamoto) Born in Showa 4 (1929), he studied under the second generation Rakuzan Fujiwara, an Intangible Cultural Property of Okayama Prefecture. (Size) - Large tea bowl: (Height) Approximately 8.7 cm (Diameter) Approximately 11.5 cm - Small tea bowl: (Height) Approximately 6.5 cm (Diameter) Approximately 11.5 cm