Overview

The Manaka Aogami #1 KokuEnn Sakimaru Sujihiki 300mm with Prisma Knife Handle is a double-bevel Japanese slicing knife forged by fifth-generation blacksmith Kisuke Manaka at Manaka Hamono in Kasukabe, Saitama. Its Aogami #1 (Blue Paper #1) high-carbon steel core is clad in multi-layered carbon-steel Suminagashi Damascus and finished with a deep black kurouchi. The fully reactive blade will develop a patina with use.

The long, narrow sujihiki profile supports clean, single-stroke cuts through roasts, brisket, prime rib, and fish. Its Sakimaru K-tip adds control for trimming and detail work. Hardened to approximately 63 HRC, the Aogami #1 core offers excellent edge retention, while the substantial spine and approximately 300-315g finished weight give the 300mm blade a stable, confident feel.

A one-of-a-kind Prisma Knife handle completes the smoke-and-ember design. Carbon fiber and gold fleck are suspended in clear epoxy and paired with a luminous pearl ferrule. The gold details resemble embers within the grey and black Suminagashi pattern, tying the blade and handle together as a cohesive custom piece.

Best Uses

Clean, single-stroke slices through roasts, brisket, prime rib, and other large proteins

Portioning raw or lightly cured fish for sashimi, sushi, and crudo

Carving poultry and large-format proteins

Slicing terrines, roulades, and other delicate preparations

Precision trimming and detail cuts with the Sakimaru K-tip

Care & Sharpening

Hand-wash with mild soap, rinse, and dry immediately. Never soak the knife or place it in a dishwasher.

Wipe the blade frequently during prep, especially when cutting acidic foods.

Apply a light coat of food-safe blade oil before extended storage to help prevent rust.

Avoid frozen foods, bones, twisting cuts, and hard cutting surfaces.

Use a soft, knife-friendly cutting board to protect the fine edge.

Maintain the edge with a leather strop and sharpen on quality waterstones when needed.

Wipe the custom Prisma handle with a soft cloth and keep it away from harsh chemicals and high heat.

Specifications

Core Steel: Aogami #1 (Blue Paper #1) high-carbon steel

Cladding Type: Multi-layered Suminagashi Damascus with carbon-steel cladding; black kurouchi finish and fully reactive

Blade Length: 300mm (approx. 11.8 inches)

Overall Length: Approximately 440-460mm

Spine Thickness at Heel: Approx. 3.8mm; varies slightly by piece

Weight: Approx. 300-315g; final weight varies with the custom handle

Blade Geometry: Double-bevel sujihiki with Sakimaru K-tip profile

Edge Grind: Double edged for right- or left-handed use

Finish: Black kurouchi, grey-smoke Suminagashi Damascus

Handle Material: Custom Prisma Knife handle with carbon fiber and gold fleck suspended in clear epoxy, plus pearl ferrule

Hardness: Approximately 63 HRC

Maker: Kisuke Manaka, Manaka Hamono, Kasukabe, Saitama

Country of Origin: Japan

Care: Hand-wash only, dry immediately, and oil for storage