Hatsukokoro—meaning “Innocent Spirit”—works withindependent and mid-sized shops to offer Japaneseknives at accessible prices. The Kumokage (“CloudShadow”) series is crafted by Tosa makers usingtraditional hammer-forged, san-mai construction.
Each knife features a Blue #2 steel edge with a hardness of HRC 62±. Popular with cooks for its ability to take a very sharp edge and hold it well, Blue #2 is a carbon steel that can be sharpened readily. Its trade-offs: it can rust or discolor, so dry the blade after use and avoid leaving it wet.
Soft iron cladding and a distinctive Kurouchi and Damascus finish complete the knife’s traditional look. With an even edge grind, the Kumokage pairs Tosa craftsmanship with practical performance.
Product details:
- Brand: Hatsukokoro
- Series: Kumokage (“Cloud Shadow”)
- Made in: Tosa, Japan
- Construction: Hammer-forged san-mai
- Edge steel: Blue #2
- Cladding: Soft iron
- Finish: Kurouchi and Damascus
- Hardness: HRC 62±
- Edge grind: Even
Use & Care
- Do not attempt to cut, hit or chop frozen products or bones. The blade can chip or break with improper use.
- Hand wash with warm water and towel dry. Never put the knife in a dishwasher, nor soak it in water. Ever!
- Use a sharpening stone to maintain the sharpness of the blade.
- Do not use on hard melons or items that may torque the blade
- Description
Hatsukokoro—meaning “Innocent Spirit”—works withindependent and mid-sized shops to offer Japaneseknives at accessible prices. The Kumokage (“CloudShadow”) series is crafted by Tosa makers usingtraditional hammer-forged, san-mai construction.
Each knife features a Blue #2 steel edge with a hardness of HRC 62±. Popular with cooks for its ability to take a very sharp edge and hold it well, Blue #2 is a carbon steel that can be sharpened readily. Its trade-offs: it can rust or discolor, so dry the blade after use and avoid leaving it wet.
Soft iron cladding and a distinctive Kurouchi and Damascus finish complete the knife’s traditional look. With an even edge grind, the Kumokage pairs Tosa craftsmanship with practical performance.
Product details:
- Brand: Hatsukokoro
- Series: Kumokage (“Cloud Shadow”)
- Made in: Tosa, Japan
- Construction: Hammer-forged san-mai
- Edge steel: Blue #2
- Cladding: Soft iron
- Finish: Kurouchi and Damascus
- Hardness: HRC 62±
- Edge grind: Even
Use & Care
- Do not attempt to cut, hit or chop frozen products or bones. The blade can chip or break with improper use.
- Hand wash with warm water and towel dry. Never put the knife in a dishwasher, nor soak it in water. Ever!
- Use a sharpening stone to maintain the sharpness of the blade.
- Do not use on hard melons or items that may torque the blade


