The label reads in Japanese:
正本山白砥 - Shōhon'yama Shiroto
合砥振特撰 - Aoto-furi Tokusen
合砥山産 - Aoto-yama san (meaning "excavated on Mount Aoto")
Translation:
"A white sharpening stone of genuine origin from Mount Aoto, specially selected."
This is a Japanese natural sharpening stone Shōhon'yama Shirotoi.e. 'authentic white stone from Shōhon'yama'. "Tokusen' (特撰) indicates that it is high quality, specially selected stone.










