Imanishi - Suiheikun - Flattening/Lapping Stone - Medium

Hitohira sources a large variety of high quality stones, offering you a wide range of price points, uses, and skill levels. Not only does Hitohira provide classic Kyoto-based stones, they also procure stones that originate from all over Japan, giving you a opportunity to use some less common stones. So whether you're getting your very first natural stone, or are searching for that perfect piece to round-out a progression, Hitohira likely has you covered.

Most stones are graded by their in-house polisher, but are otherwise graded by Strata.

Brand: Hitohira ひとひら (一片)
Producing Area: Kyoto, Kyoto Prefecture - Japan
Mine: Nakayama 
Strata/um: 
Appearance: What may seem initially unremarkable, in fact contains some stellar renge patches intermixed with beautiful, deep yake when wet.
Size: 206mm x 82mm x 25mm
Weight: 918g
Est. Grit: 6000-8000

1-5 Scale: 1 = Less, 5 = More
Hardness Level: 4.5
Scratch Depth: 1.5
Speed: 3.5
Wear Rate: 4.5
Self Slurry: 1.5
Thirst: 2
Consistency: 4.5
Feedback: 2
Ease of Use: 3

Recommended Uses: Very keen edges; ura; glossy kasumi; microbevels; push-cut tools; razors

Notes: This is a "very" stone — very fast for its hardness; very fine scratch pattern that yields very bright and even kasumi, very consistent feedback, very keen results on edges and ideal for push cut tools and razors. It's great to see newly mined Nakayama stones hit the market every now and then. The only note would be that since it's hard, you will need to be mindful of your pressure. Using a nagura or forcing a slurry can help a lot in adding "cushion" between the blade and the stone.

Please Note: Given the natural aspect of these stones, all graded characteristics are our own subjective thoughts which may vary from your expectations and assessment. The images shown and characteristics described may be from a previous, random example, or when first measured before being tested numerous times. If purchased, yours may differ slightly in appearance and qualities.

Hitohira sources a large variety of high quality stones, offering you a wide range of price points, uses, and skill levels. Not only does Hitohira provide classic Kyoto-based stones, they also procure stones that originate from all over Japan, giving you a opportunity to use some less common stones. So whether you're getting your very first natural stone, or are searching for that perfect piece to round-out a progression, Hitohira likely has you covered.

Most stones are graded by their in-house polisher, but are otherwise graded by Strata.

Brand: Hitohira ひとひら (一片)
Producing Area: Kyoto, Kyoto Prefecture - Japan
Mine: Okunomon
Strata: Tomae?
Appearance: Asagi surface when dry, but nice scattering and zones of Ao and Aka Renge with some purple and red splotches when wet
Size: 204mm x 76.6mm x 38.9mm
Weight: 1394g
Grit Range: 3000-5000

HITOHIRA'S GRADING
1-5 Scale: 1 = Less, 5 = More
Hardness: 3.7
Grain Scale: 3
Sharpening Speed: 3.9

Recommended Usage: Kitchen knife (edge); kitchen knife (bevel); Hagane polish; Chisel, plane.

Notes: Very strong grinding power. Manageable hardness. Easy to use.

Please Note: Given the natural aspect of these stones, all graded characteristics are our own subjective thoughts which may vary from your expectations and assessment. The images shown and characteristics described may be from a previous, random example, or when first measured before being tested numerous times. If purchased, yours may differ slightly in appearance and qualities.

One of our most trusted sources handpicks these stones from the famed Imanishi in Kyoto for us, spending hours testing dozens and dozens and selecting only the best of the best at a variety of price points. These tennen toishi represent some of the highest quality you will find on the market for natural stones.

These stones are so impressive that they often make you feel like you are "cheating", so to speak - they provide outstanding results at a speed seemingly found only in stones that cost many times more, all while being fun and easy to use - they make it seem as if you have learned years of polishing in a matter of minutes. Combining these gems with the correct steel, you will come to understand the beautiful harmony skilled polishers sometimes have difficulty describing - working on natural stones with well-made knives truly ties the whole subject together.

Because each stone is tested extensively by Komon before they are sent to us, we honor their notes and grading system listed below.

We are proud to provide such wonderful pieces to you!

Stone: Ohira Suita
SKU: 260303-Ohirasuita
Size: 206mm x 75mm x 49.5mm
Area: Kyoto
Mine: Ohira
Layer: Suita
Grit: 6,000-8,000

Hardness: Medium
Finesse: Fine
Cutting Speed: Fast
East of Use: Medium

Recommended Use: Best suited for kitchen knives and Japanese wood working tools, single and double bevel iron clad carbon steel.

Interpretation of the Stone: This Ohira Suita was overall a very fine stone with strong cutting speed, making it very easy to transition from a 3K synthetic stone. This Ohira Suita is on the finer side, bringing up detail in iron cladding. Best used with very little water to start the stone and polishing process. Also worked well with a slurry from a a very worn 1500 atoma to make a very fine mud. Tested on Tanaka blue 1 sanmai, Tamahagane and wrought iron with excellent results, good feedback. On white 1 Honyaki, due to the stone's fine texture, honyaki can be a bit challenging, but doable. The edge produced from this stone was very crisp yet fine.

Authenticated On/By: Ivan Fonseca 03/16/2026

Fine powder of Suita stones. Ideal for fine-tune polishing. Can be applied with numerous applicators like a cotton ball, rag, cork, felt, balsa wood, etc. Water is needed to apply. May require further powderizing of any potential slightly larger bits. Mid-range fineness for a natural stone powder. 

Please Note: These pictures and measurements are examples. Your specific product may differ slightly in appearance and measurements.

Please Note: These pictures and measurements are examples. Your specific product may differ slightly in appearance and measurements.