Naniwa Chosera #10,000 Grit Japanese Whetstone SS10000

Sale price$505.00

Exclusive to the Japanese market, the Naniwa Chosera stones are premium-grade sharpening tools renowned for their rapid action and exceptional feedback. These stones offer a variety of harnesses across different grits, making them suitable for a broad range of steel types. Their high grit density and larger size result in a longer stone life compared to other models.

The Naniwa Chosera is a line of top-tier ceramic stones, typically reserved for professional sharpeners in Japan. This series is designed with a higher density of abrasive particles, making them more durable, resistant to wear, and faster cutting. The stones are categorised into three groups based on their abrasiveness: Coarse, Medium, and Fine.

  • Coarse Grits (#400, #600, #800): These aggressive stones are excellent for stock removal, repairs, and reprofiling. The #400 is a very hard stone, perfect for removing deep scratches, while the #600 provides a buttery feedback, ideal for harder steels. The #800 stone gives a good, basic working edge.
  • Medium Grits (#1,000, #2,000, #3,000): These stones refine edges to a working sharp level and are also suitable for minor repair and profiling work. The #1,000 stone is slightly more refined than other 1K stones. The #2,000 stone excels on softer steel knives, while the #3,000 stone sets the edge up for the polishing stages.
  • Fine Grits (#5,000, #10,000): These stones take every edge to a whole new level. The #5,000 stone produces a mirror finish, while the #10,000 stone takes the mirror finish even further, refining the edge to shaving sharp levels.
  • Made in Japan
  • Model: SS10000
  • Size: 210 x 70 x 30mm
  • Material: Magnesia bonded
  • No base included
  • Weight: 1450g

Each Chosera stone comes with a Nagura stone (65 x 50 x 33mm, #600 grit) for developing a slurry for finer cutting. The Nagura stone is not intended for flattening the whetstone.

We recommend soaking the Chosera stone for only 2-3 minutes before initial sharpening. Once soaked, splash with water to keep the surface wet. The Nagura stone should be soaked for about 10-15 minutes before use. Wet your whetstone and work the Nagura stone all over the whetstone in a circular pattern. Rinse after use and allow the stone to air dry naturally in a shaded position. Avoid rapid drying as it can cause cracking, and do not leave the stone in water as it can cause degradation.


  • FREE Standard Delivery Over $200
  • FREE Customer Pick-Up (Syd Only)
  • Same day dispatch until 2PM AEST (Mon-Fri)

Delivery Area

Sydney, Wollongong, Newcastle, ACT, Central Coast, Adelaide
Melbourne, Geelong, Ballarat, Bendigo
Brisbane, Sunshine Coast, Gold Coast, Hobart
Perth, Darwin
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2-4 Days
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5-10 Days
7-12 Days


Next Day
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Same day dispatch until 2PM AEST (Mon-Fri)

*Delivery estimates provided by Australia Post

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Customer Reviews

Based on 5 reviews
Richard S

Unbeatable performance


Easy to assemble and install


Impeccable Performance

Toby M

Mirror Polish

Janelle C

Impressed with the efficiency

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