Maruichi Nakayama Aisa Japanese Natural Finishing Whetstone

It measures:
195 mm (7.68 in) long × 70 mm (2.76 in) wide × 20 mm (0.79 in) tall, and weighs 737 g (26.00 oz / 1.62 lb).

Hardness: 4.9
NOS Maruichi Nakayama Aisa. Maruichi Shokai was a popular tennen toishi wholesaler and shop which closed down decades ago. This piece is from their remaining inventory which was stored by a specialty carpentry shop in Japan. Maruichi Nakayama stones were sold/traded directly from Hatanaka/Kato inventory so this stone was processed using their inventory. maruichi stones are highly revered in the razor, knife and tool communities and for great reason.