Koken Ltd.

Koken Ltd. produces and sells occupational personal protective equipment and environmental quality improvement equipment in Japan, operating through its Mask-Related Business, Environmental-Related Businesses, and Other Business segments. Its clean air solutions include KOACH, a clean zone creator, and KOKENLAMINAR, a push-pull ventilation system. The company also offers surgical masks, respirators such as particulate respirators, chemical cartridge respirators, and gas masks for industrial use, as well as respirators for general consumers, protective clothes, earplugs, and face shields. Founded in 1943, it is headquartered in Tokyo, Japan.