Style: Petty (Utility)
Core: Aogami #1hardened to HRC63-64
Cladding: Carbon Steel
Finishing: Kurouchi (Blacksmiths/Rustic) Finish
Blade Length: 135 mm
Overall Length: 265 mm
Weight: 79gm
Blade Height @ Heel: 31mm
Spine Thickness @ Heel: 3mm
Spine Thickness @ Tip: 0.7mm
Bevel: Double Bevel
Handle Material: Right-Handed D-Shaped Rosewood

TOSA-UCHIHAMONO
Tosa knives are known for their hammer-forged technique known as Warikomi. This is a method where a glowing piece of cladding is split and the core cutting edge inserted. It is then forged together by hand in a complicated process that requires a prominent level of finesse and competence.
Blue Steel is traditional, high-carbon steel made by Hitachi Metals in Japan. It is the favorite steel of many knife makers and chefs across the world for its fantastic edge-holding ability, toughness, and ease of sharpening.
It contains few stainless elements, and as such will develop a patina, and develop rust spots if left wet after use. It requires a little more care and maintenance than something like VG-10 (Stainless Steel), so consider this when purchasing a Blue Steel knife as your first Japanese knife.

Washing – Hand wash with soapy water, rinse the blade with Hot water. Dry your knives as soon as possible after washing and do not leave them wet for extended periods of time. Do not wash in a dishwasher!

Storage – Store in a cool, dry place. Do not store in cutlery draw with other knives. Use a knife rack or at a minimum a cover for the knife to protect the edge

Sharpening - It is recommended to sharpen these knives to a fine edge on a Japanese Whetstone. However, for touch-up sharpening, you can use a Ceramic Steel and a 2 or 3 Wheel Japanese Water sharpener as these are designed for the angle of bevel angle of Japanese knives.