Hiroaki Masui was born in 1944, joined knife maker when he was 16 years old and worked for 30 years. He developed original model, manufacture, and market his creation. Thereafter he established HIRO KNIVES aiming to provide added value at reasonable price for end users. Collaboration of Japanese traditional culture and today’s high technology are considered in his creation. As a tool, it is realistic, user friendly, basic, yet originality and beauty are key point.