Kanzo Tsujino

Kanzo Tsujino, born December 31, 1948, is a Japanese-American designer and inventor whose work has significantly shaped ASICS' athletic equipment line, particularly in wrestling and protective gear. His patents reflect a career dedicated to combining aesthetic appeal with functional improvements, enhancing athlete safety and performance through thoughtful, practical design.

Professional Background and Role at ASICS

Tsujino's career with ASICS Corporation (headquartered in Kobe, Japan) likely began in product design and development, where he contributed to the company's expansion into specialized athletic accessories. Living in California near ASICS' U.S. operations—allowed him to collaborate across continents. His expertise spans ornamental and utility designs, with a focus on wrestling headgear and protective equipment that balances protection, ventilation, and comfort for high-intensity sports.

Innovation in Wrestling Headgear and Patents

Tsujino's contributions helped refine ASICS' wrestling offerings during a period when the brand solidified its presence in the U.S. market. Key patents include:

• US5685021A (granted 1997): "Protective Headgear for Wrestler," a utility patent featuring a pair of ear guards with a disk-like plastic core, vent openings for pressure equalization and hearing, silicon gel cushioning on the edge for shock absorption. This design improved safety by reducing slippage, preventing eardrum damage from pressure changes, and providing superior impact protection against cauliflower ear, while maintaining comfort and affordability.

These inventions supported ASICS models like the Asics Gel Headgear and Asics Quantum series, introducing features such as breathable perforations and lightweight construction that became staples in wrestling gear.

Contributions to Wrestling Safety Through Kneepad Inventions

Tsujino also advanced wrestler safety through protective kneepads, addressing common injuries from takedowns and ground work. One notable design patent:

• D394,332 (granted 1998): An ornamental design for a knee pad, emphasizing ergonomic shaping for better fit and mobility while providing robust padding. This is the, now classic, volleyball kneepad frequently used by wrestlers.

These inventions enhanced wrestler protection, minimizing bruises, strains, and long-term wear, and complemented ASICS' wrestling line by promoting overall body safety in a sport prone to repetitive trauma.

Legacy and Honors

While Tsujino's individual honors are not publicly prominent—common for corporate inventors—his designs have helped ASICS maintain a strong reputation in wrestling equipment worldwide. He contributed to products used by athletes at all levels, blending Japanese precision engineering with practical insights for American sports culture.

Kanzo Tsujino's career exemplifies dedicated innovation within a major brand, creating gear that protects and performs. His patented designs continue to influence wrestling safety, ensuring athletes compete with confidence and reduced risk of injury.