This Higonokami Koriwa Turquoise friction folder is the real deal and stylish EDC, made in Japan by Nagao Higonokami. It has blue paper steel reverse tanto blade with a razor-sharp edge, which is fully concealed in the turquoise finish brass handle when closed. It is extended tang with a lanyard hole for easy carry.
Currently, all Higonokami are handmade by artisan craftsman Mr. Mitsuo Nagao, the fifth generation of Higonokami maker.
Higonokami is patented. Although there are plenty of people trying to copy the design, Mr. Nagao is the only person on earth that is allowed to make the original Higonokami knife.
Blade Material: Blue Paper Steel
Blade Length: 2.88" / 75mm
Length Closed: 3.88"
Length Open: 6.76"
Handle: Turquoise Finish Brass
Weight: 50 g
Locking System: Friction Lock
Made in Japan
What is Blue Paper Steel? Origin. It is called Blue Paper Steel because its manufacturer Hitachi packs them with a piece of blue paper. It has a cousin called White Paper Steel. White Paper Steel is identical to the traditional Tamahagene steel used for the production of Samurai sword but made in a modern way.
Blue Paper Steel is White Paper Steel with the addition of small quantities of chrome and Wolfram. That improves the characteristics of Blue Paper Steel making it better corrosion and chipping resistant comparing White Paper Steel.
You will find Blue Paper Steel in high-end cutlery for its superior edge retention and ease of sharpening.