Aiiwatani Suita Suminagashi Japanese Whetstone

This exceptional Japanese whetstone was selected by us and imported directly from Japan, thoroughly tested and sealed on sides and back to protect the stone for long term use. 

It measures 245 mm (9.65 inches) long × 80 mm (3.15 inches) wide × 40 mm (1.57 inches) tall, and weighs 1905 g (67.17 oz / 4.20 lbs).

Hardness: 4.6
A rare, large Aiiwatani Suita with excellent hardness. This stone is most likely a combination layer stone containing mixed layers of Hon Suita and Aisa.It is very rare to see Aiiwatani Hon Suita and a stone this large, even more so. The stone has a dense, firm feel while remaining user friendly. This is likely do to the mixture of Suita/Aisa. This stone is quite fine for an Aiiwatani Suita which is very rare to see as most seen are softer, Tenjou Suita. This stone has a very smooth feel for a hard and fine stone. Razors can be finished using this stone as it's base has plenty of hardness for efficient particle breakdown. This stone is capable of varying finishes depending on how it's used. Diamond plate slurry results in an aggressive, fast cutting stone resulting in a hazier finish. When used with water only and light pressure, the stone is capable of finishing with a considerably more fine, bright mirror-like finish. When used for knives/tools, the stone performs similarly with inky black swarf and little self slurry when used standalone. When slurry is forced, the stone speeds up and depending on the slurry medium, the stone can finish either hazy or bright and mirror like. When used with water only and declining amounts of pressure, the stone will polish to a bright, clear finish and brings out details in the cladding. A beautiful stone visually, with excellent size and high performance characteristics. Extremely rare and valuable stone.

A photo of the stone's polishing ability on a high quality Japanese kitchen knife is shown.