These are made out of aogami #2 also known as blue steel #2 and comes with a leather Sheath (Saya). The blacksmith Itsuo Doi crafted and forged with blue steel #2 in Sakai Osaka. This item has extremely limited availability.
These are great for the outdoors for such things as for camping, hunting and fishing. Please do not cut bone or frozen food. It may cause the blade to chip.
Outdoor Knife Aoniko (BLUE STEEL #2) - Kotengu
Blade Length: 80 mm (3.1")
Weight: 73 g
Blade Width: 25 mm
Blade Thickness: 3 mm
Handle Length: 68 mm
Handle Thickness: 3 mm