Sakai Takayuki Aoko or Blue Paper (Aogami) No.2 Steel Knife series are made from famous Yasugi steel, known as prime high carbon steel, which has been widely used for a long time in Japan.
This material has highest wear resistance and toughness because of special hardness. Very good choice for high end Japanese kitchen knives.
Speaking to the Ebony Wood handle, the Japanese-Style Octagonal figure fits better comfortably to your hand.
The Buffalo Tsuba equipped to the handle represents high-quality and excellent durability, that means made for professional originally.