Studio Art Pottery Tea Bowl Sake Cup Handmade Green Glaze Brown Signed Vintage

Studio Art Pottery Tea Bowl Sake Cup Handmade Green Glaze Brown Signed Vintage Nice Japanese style, green glaze over brown cup/bowl is signed, but cannot identify the mark? Incised with 2015 separated by a Pear mark in the center. Swirl base interior. Measures approx. 2 1/2” diameter and 2 1/4” tall. Excellent preowned condition; no chips or cracks. Nice for tea, espresso, sake or even for matches, incense or a votive candle.