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Masamoto Sohonten  |  SKU: MASA_SW3121

Masamoto Sohonten SW Gyuto 210mm SW3121

Sale price $586.98 Regular price $689.95

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Availability

  • St Peters, NSW —
    2 Bishop St, Unit 2, St Peters NSW 2044
  • Crows Nest, NSW —
    107 West St, Shop 1, Crows Nest NSW 2065
    Pickup only
  • Prahran, VIC —
    180 Commercial Road, Shop 1, Prahran VIC 3181
    Pickup only

Goes well with

Detailed Specifications
Line Masamoto SW
Profile Gyuto / Chef's knife
Bevel Type Double Bevel
Weight 135 g | 4.8 oz
Edge Length 221 mm | 8 45/64″
Heel Height 45 mm | 1 49/64″
Width @ Heel 3.0 mm | 1/8″
Width @ Mid 2.5 mm | 3/32″
Width @ 1cm from Tip 1.0 mm | 3/64″
Steel Swedish Steel | Stainless
Blade Construction Monosteel
Typical hardness 58 to 60 HRC
Surface Finish Migaki
Handle D Shaped Ho Wood Black Ferrule
Region Tokyo
Best for
  • Pro chefs
  • Enthusiasts

Free shipping for knives over AU$200 Australia wide.

World-wide shipping via DHL Express, 3 to 6 days (not available in the UK).



The Masamoto KS series, particularly the KS double bevel line up, including the unicorn KS 3124, is loved by many many professional chefs and enthusiasts because of its unique and excellent profile; also because it is super light and nimble.

Arguably the only problem? The rustic carbon steel used in the KS line can be problematic during the busy service sessions in a western kitchen. As a result, Masamoto created the SW series, which is the stainless equivalent of the white steel (KS) line, employing the same great cutting performance without the need to worry about the rust. The Swedish steel is very refined, offer decent hardness and excellent toughness.

Video Review

Pros Cons
  • Great for professionals
  • Excellent performance
  • High budget
  • Relatively hard to sharpen
Care Instruction
  1. Don't cut hard things! Japanese knives are brittle so bone hacking is a NO NO!
  2. Wash with neutral detergent after use, and wipe dry;
  3. Please don't wash knife with dishwasher, it will damage the wood handle;
  4. Be careful not to leave the knife close to a heat source for a long time;
  5. It is a lot more dangerous to cut with a blunt knife than a sharp knife!
  6. It is best to sharpen a Japanese knife regularly on a waterstone.

Masamoto Sohonten

Masamoto Sohonten of Azumabashi, Tokyo

Masamoto Sohonten (正本總本店) is the knife house at Azumabashi in Sumida-ku, Tokyo, and is the holder of the MASAMOTO registered trademark. The company says a separate Masamoto business was established independently in 1951 and that the two businesses have entirely different products and organisations.

It began with Minosuke Matsuzawa, born to a blacksmith in Osawa, Bushu (Saitama Prefecture). He went to Osaka in 1862 to learn genuine knife forging, came home to Osawa in 1866 and began making cooking knives. The company's history says it was the first in the Kanto region to make and sell genuine tempered blade cooking knives, in 1874. In 1890 it opened in present-day Azumabashi, Sumida-ku.

The name came from Minosuke's mark: he engraved the masa character (正) on his knives as proof he had made them himself. When trademark registration began in 1884, the second generation, Kichizo Hirano, tried to register that character, but a knife shop in Osaka already used it. On business partners' advice, since the knives used genuine steel, he placed the moto character (本), part of the Japanese word for genuine, under it. Masamoto was registered in 1903 as trademark No. 20269.

The company lists six generations: Minosuke Matsuzawa, then Kichizo Hirano, who led the house from 1891, Sakichi Hirano, Masakichi Hirano, Morisuke Hirano, who was conferred the Order of the Rising Sun, Gold Rays with Rosette, and Masahiro Hirano, the sixth generation. The company says only Masamoto Sohonten has carried on Minosuke's methods of hardening, tempering and polishing, and that its range grew from chefs' feedback. It marked its 150th anniversary in 2016.

The lines we list include White 2 Hongasumi (KS) single-bevel knives in yanagiba, takobiki, kiritsuke yanagiba, deba, mioroshi deba, usuba, kamagata usuba, mukimono and hamokiri, alongside KS sujihiki, petty and gyuto, including a K-tip gyuto. The White 2 Kasumi (KK) line includes deba, usuba, yanagiba and takobiki. White 1 appears in the KI Hongasumi yanagiba, Blue 2 in the Aoko Hongasumi yanagiba, and the honyaki yanagiba comes in both White 2 (HS) and Blue 2 (HA). The stainless lines include VG series gyuto, santoku, petty, sujihiki and honesuki, VG Cobalt yanagiba, and MV katana and kiritsuke shapes. The Swedish steel SW line includes gyuto, K-tip gyuto, sujihiki and petty.

“Six generations of knife making since 1866, at Azumabashi in Tokyo since 1890.”

Est. 1866 | 慶応2年
Known for Excellently built traditional single bevel knives and KS series Gyuto
Website masamoto-sohonten.co.jp Read more about Masamoto Sohonten

Masamoto Sohonten · Tokyo

Knife details

Frequently asked questions

Gyuto or santoku: which should I choose?

The gyuto came to Japan with the beef-eating culture of the Meiji era, and that is where its name comes from. Tojiro says it is used for all kinds of cooking, which is why it is also called the chef's knife.

The santoku is a household knife that combines the good points of the nakiri and the gyuto. Tojiro describes it as all-purpose, from vegetables to meat and fish, double-bevel and built on the same construction as a Western knife.

Choose a gyuto if you want more length and reach. Choose a santoku if you want a shorter all-purpose knife. Tojiro's own size figures: gyuto 150 to 210mm for household use and up to 360mm for professional use, santoku 165 to 170mm for household use.

What is a gyuto knife used for?

The gyuto (牛刀) is a chef's knife for all kinds of cooking, and it is basically double-bevel. A knife maker's guide says it came to Japan in the Meiji era with the culture of eating beef, which gave it its name, but it does not cut only meat.

A Japanese dictionary describes the gyuto as slimmer than a santoku, with a pointed tip, used widely for meat, fish and vegetables.

What gyuto length should I choose?

A knife maker's guide lists 150 to 210 mm, double-bevel, for home use, and 180 to 360 mm, single- or double-bevel, for professional kitchens.

We suggest starting with a 210 mm gyuto for a home kitchen, and stepping up to 240 mm if you regularly cut large pieces and have the board for it.

240mm vs 210mm gyuto: which size should I choose?

Get the 210mm. We only point people to a 240mm when they have about 45cm of usable board, cook in volume, and regularly break down big roasts or whole fish.

On the gyutos we've measured for our product pages, the extra length is real. As of October 2026, the 210mm gyutos we list have a median edge of 213mm from heel to tip, across the 111 we have measured; the 240mm ones have a median of 240mm, across 100. The 240s are also heavier, 212g against 175g at the median, and a touch taller at the heel, 50mm against 48mm, across the same 100 and 111 knives.

Weight overlaps between the two sizes. As of October 2026, 11 of the 100 measured 240s weigh less than the median 210 at 175g. The 240s we measured weigh 146 to 323g, and the 111 measured 210s 121 to 255g. The number in the name does not decide how heavy a knife is, so check the measured weight on the product page.

Japanese or German kitchen knives: which should I buy?

These are two design families, not a national specification, and many modern knives mix both. Japanese profiles are typically thinner, so they suit push and pull cuts; German profiles carry a fuller belly, which suits rocking. A given knife is its own evidence, so look at the blade you would buy rather than the country label.

Edges follow the same pattern. Many German knives ship at about 15 degrees per side, while many Japanese knives run about 10 to 15; check the model you are buying. A smaller angle is sharper but less forgiving. Hardness is a per model figure too. On two common Japanese steels the steel makers' own figures start at 60 HRC: Takefu Special Steel rates VG10 at 60 HRC or more, and Proterial lists the hardening hardness of Aogami 2 (Blue 2) as over 60 HRC.

A Japanese knife suits precision work where a sharp edge and nimble handling matter; a German knife suits heavier prep and rocking cuts where a substantial feel and a more forgiving edge matter. Whichever you choose, keep the edge off bone, frozen food and very hard squash, and use a wooden or plastic board.

What is the flat spot on a knife, and is it the same as the "sweet spot"?

The flat spot is the straight run of edge from the heel towards the middle, the part that meets the board along its length. It is commonly known as the sweet spot; some people also use "sweet spot" for the balance point, so ask which one someone means.

Past the flat, the edge curves up towards the tip (the belly), which suits a swinging or pulling stroke. Sharpeners also say "flat spot" for a worn patch of edge, so when you mean the shape, "the flat part of the edge" is clearer.

Gyuto or chef's knife: what is the difference?

A gyuto is a chef's knife, and its shape is largely modelled on the French chef's knife: a fairly flat run of edge near the heel, then a curve up to the tip. A German-style chef's knife has a bigger belly and curves along much more of its edge.

The flat run suits push and pull cuts, and the belly is made for rocking. That flat run is commonly known as the sweet spot.

Is Swedish steel stainless?

The makers use different wording. Masamoto Sohonten labels its Swedish steel rust-resistant, while Aoki Hamono lists Sakai Takayuki GinRyu SW as stainless for professional use.

Neither maker names the grade. The Japan Stainless Steel Association defines stainless as an iron-based alloy with 10.5% chromium or more that rusts less, so wash and dry these knives after use anyway.

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