Yamatoku this kiln started in the early Meiji (1868-1912) period and is still operative today. According to a Hizen marks book this Yamatoku mark dates to late Meiji - Taisho, which is around 1920s to 30s.
Shogatsu: Kikko-yaki has been a type of ceramic works of Osaka, Japan for about 200 years. Kikko-yaki is a type of porcelain pottery. Currently, the ninth Yoshimukai Shogetsu. There are currently three potters who are artists at the kiln, representing the 7th, 8th and 9th artists. The oldest history about the wares of Kikko-Shogetsu found so far is from the kiln site but all Japanese. Osaka, a city not known as much for ceramics as others, so it’s rare for a kiln to be found there. The mark on the bottom of their ware usually reads Kikko-Shogetsu, a shared Master potter name.