Kai Seki Magoroku 1000/4000 Grit Combination Whetstone

Sharpen and Polish. One Stone.

Experience the most versatile stone in the Kai Seki Magoroku range. The 1000/4000 Grit Combination Whetstone covers the two most-used stages of sharpening in a single stone - the 1000 grit side restores a dull edge quickly, while the 4000 grit side refines and begins polishing it toward a razor finish. The ideal all-in-one stone for cooks who want a complete sharpening result without managing multiple stones. Includes the multifunctional base and storage case.

The Specs

• Grit: 1000 (medium sharpening) / 4000 (medium-fine refining and polishing)
• 1000 grit: Restores a dull edge efficiently
• 4000 grit: Refines and begins polishing the edge toward a razor finish
• Includes: Multifunctional base and storage case
• Base: Ribbed non-slip surface, water reservoir keeps stone wet
• Case: Top doubles as a soaking tray with fill line guide
• Compatible with: All double-bevel Japanese and Western knives
• Origin: Japan

Where This Stone Fits in Your Sharpening System

The 1000/4000 combination is the most practical single stone for regular home sharpening. The 1000 grit side handles the majority of sharpening work - removing enough metal to restore a dull edge without being so coarse it requires extensive follow-up. The 4000 grit side then refines the scratch pattern left by the 1000 grit, producing a noticeably sharper and smoother edge. For most cooks, this stone alone covers 90% of their sharpening needs. For a full mirror polish, follow with the 8000 grit finishing stone.

How to Use

• Fill the case top with water to the fill line and soak the stone for 5-10 minutes
• Place the stone in the ribbed base - fill the base reservoir with water to keep the stone wet
• Start with the 1000 grit side to restore the edge - sharpen at 16° for Japanese knives
• Move to the 4000 grit side to refine and begin polishing
• Keep the stone wet throughout - add water as needed
• Rinse and dry after use, store in the case flat to prevent warping
• Flatten periodically with a leveling stone