Higo no Kami Tokudai (sizeL), Nagaokoma Blade 10cm~11cm(sizeL), Hitachi-BlueSteel, Sanmai Handle 12cm, Stainless, Aogami-Honwarikomi All Hand-Made, Forging and Hummered Work Japanese Traditional Crafting Technique, over 100 years Nagaokoma company only can make HIGONOKAMI in Japan. They have a trademark registration in Japan. hard to find in USA.
used to have 1 of those higonokami, wicked sharp! a bit diferent from yours mine made by Master Hattori here's a pic of it, not my pic, it's from my dealer page i thing my dealer said it's a traditional japanese carpenter folding knife