天然 砥石 正本山 菖蒲 山城国産\r\r歴史の古い菖蒲産の天然砥石です。\r中山、奥殿、大突などの良い砥石の産地、梅ヶ畑産出です。\r多少硬め\r\rよろしくお願い致します。\r\rNatural whetstone Shohonzan Shobu, Yamashiro domestic product\r\rThis is a natural whetstone produced in Shobu, which has a long history.\rIt is produced in Umegahata, an area of good whetstones such as Nakayama, Okudono, and Daitori.\rSlightly hard\r\rThank you very much for your cooperation.