1. Material: Takawa Keiko Knife is made of jade steel, which is a unique steelmaking process in traditional Japanese casting knives and cannot be made in electric furnace, so jade steel is a unique material of traditional Japanese knives.
2. Sharpness: Gao Qiao Goro's tool making skills are exquisite, and his tools can manually polish mirrors that are almost difficult to observe with the naked eye without using modern power tools.
3. Seal: The real Gao Qiao Dao is engraved with the craftsman's seal, including the seal of Gao Qiao Goro, the seal of Gao Qiao Shield and the seal of Liang Qian's silver seat.
The above are some methods to judge the authenticity of Koko Keiko Dao. Other questions can be consulted by professionals.