Sawakazuma SRS13 Laser Gyuto 180 mm (7.1") / 210 mm ( 8.2") – Rosewood Handle

Uncompromising Cutting Dynamics for the Discerning Station

The Sawakazuma SRS13 Gyuto 210 mm is built strictly for high-level professional chefs and experienced culinary purists who demand surgical cutting geometry. In high-tempo line work and serious prep kitchens, blade thickness is the primary determinant of cutting resistance. Ground to an extraordinary 1 mm spine, this knife operates in the rarest tier of Japanese cutlery: a true "laser" grind that eliminates the physical friction and lateral displacement found in conventional chef knives.

With an authentic 210 mm (8.2") cutting edge and balanced Wa-ergonomics, it offers absolute tip control for horizontal shallot dicing, precise silverskin trimming, and flawless single-stroke protein push-cuts.

SRS13 Powder Metallurgy Core: 63–64 HRC

At the heart of the blade is SRS13 Powder Metallurgy High-Speed Tool Steel, hardened to an uncompromising 63–64 HRC. Manufactured via rapid gas-atomization, SRS13 possesses an exceptionally uniform carbide distribution that conventional ingot-cast steels cannot replicate.

• Extreme Wear Resistance: The dense tungsten, molybdenum, and vanadium carbide matrix holds a razor apex through punishing commercial prep shifts, resisting dulling far beyond conventional VG-10 or standard high-carbon alloys.
• Full Stainless Integrity: Despite performing with the crisp cutting feedback and tooth of high-purity carbon steel, SRS13 provides complete corrosion and acid resistance, withstanding continuous contact with citrus, shallots, and high-acid ingredients.

Why an Ultra-Thin 1 mm Laser Profile Commands a Premium

Chefs often ask why a knife with less physical mass commands a significantly higher price than thicker, heavier kitchen knives. The answer lies in the unforgiving manufacturing tolerances required to forge and grind high-hardness powdered steel:

1. High-Stress Grinding & Heat Management: Grinding hardened 63–64 HRC powdered metallurgy steel down to a 1 mm profile is a slow, exacting hand process. Unlike thicker, mass-manufactured blades that can be rapidly shaped on industrial dry wheels, an ultra-thin blade overheats instantly. Master grinders must shape the blade by hand on low-speed, water-cooled whetstones, constantly checking blade tension. A single second of excessive heat will ruin the steel's temper, destroying the blade.
2. Extreme Warping & Quench Attrition: Heat-treating a high-alloy steel to 63–64 HRC creates immense internal stress. At a standard 3 mm to 4 mm thickness, a blade has the structural mass to resist warping during oil or cryogenic quenching. At just 1 mm, the risk of warping, twisting, or micro-fracturing skyrockets. Producing a dead-straight, 1 mm powdered steel blade results in a dramatically higher scrap rate at the forge, requiring master-level smiths to hand-straighten and temper each piece.
3. Zero-Wedging Cutting Physics: Thicker knives (even those with sharp apexes) wedge, split, and crack dense ingredients like heirloom carrots, daikon, and sweet potatoes due to their shoulder thickness. A 1 mm laser spine displaces virtually no material as it moves through food, dropping through cell walls with near-zero resistance and preserving delicate food textures without bruising.

Rosewood Ergonomics

The blade is mounted to a natural Rosewood handle. Dense, structurally stable, and naturally oily, rosewood provides superior water resistance and a tactile grip that will not degrade under heavy kitchen sanitization routines. The ambidextrous profile provides neutral, fatigue-free control for both pinch-grip push cutting and delicate detail work.

Technical Specifications

What’s in the Box?

• Sawakazuma Presentation Box: Traditional Japanese presentation packaging for protective storage.
• Protective Edge Sleeve: Heavy-duty blade guard securing the 1 mm apex during transit and unboxing.

Authorized Dealer Inspection

Hasu-Seizo directly sources authentic Japanese cutlery from master makers. Because ultra-thin laser knives require zero tolerance for warping, every Sawakazuma SRS13 Gyuto is individually inspected on a granite surface plate at our Seattle area warehouse to verify absolute straightness along the 1 mm spine, perfect bevel symmetry, and flawless handle mounting before dispatch.

Sharpening & Maintenance

• Whetstone Maintenance: At 63–64 HRC, SRS13 is remarkably wear-resistant. To maintain its surgical apex, we recommend using high-quality Japanese whetstones. Start with a medium whetstone (#1000 to #2000 grit) to establish edge bite, followed by a fine whetstone (#5000 to #8000 grit) and leather stropping for a polished, frictionless edge.
• Cutting Technique: This knife is a surgical slicer, not a chopper. Use fluid push, pull, or glide cuts. Avoid aggressive twisting, lateral torque, or scraping the blade edge sideways against the cutting board.
• Board Selection: Pair exclusively with premium end-grain wood (walnut, cherry, maple) or high-grade synthetic soft rubber boards (Asahi, Hasegawa). Never use bamboo, glass, marble, or composite boards.
• Restrictions: Do not cut through bones, frozen foods, dense cheese rinds, or hard pits. Hand-wash with warm water and mild soap, then towel dry immediately. Never clean in a dishwasher.

Frequently Asked Questions

Why is a 1 mm laser knife more expensive than a thicker forged knife? Grinding 63–64 HRC powdered steel to a 1 mm thickness requires low-speed hand-grinding to avoid ruining the temper, and heat-treating thin stock carries a much higher forge failure rate, demanding master-level craftsmanship.

What are the performance benefits of SRS13 powder steel? SRS13 offers exceptional wear resistance and holds a keen edge far longer than standard stainless steels, while providing complete stain resistance and the smooth whetstone feedback of high-carbon steel.

Can I use a honing steel on an SRS13 blade at 63–64 HRC? No. Never use standard grooved steel honing rods on a 63–64 HRC laser blade, as they can chip the ultra-thin apex. Use fine whetstones or a smooth leather strop for edge realignment.

Where does this knife ship from? All knives are inspected, stored, and shipped directly from our warehouse located in the Seattle area.