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At the present website, I am highly honored to introduce KOKEN LTD. to you.

KOKEN LTD. stands today as the leading manufacturer of respiratory protective devices, and is proclaimed to be a steady fast company which is also advancing into the fields of environment-preservation and medical-care industry, utilizing our own technologies developed for a long time.

We have compiled this website with the main aim of presenting briefly our uniquely-developed technologies to you. That's because we have been dedicated ourselves to business activities only in the domestic market and now we do have a strong desire to do business on a world-wide level.

We are very anxious to take a lot of opportunities for realizing joint research and development projects and joint-ventures or business tie-ups, as well as for welcoming new shareholders, through interactive communications facilitated by this website.

Best regards,

Shinichiro Sakai
Chairman and Chief Executive Officer of KOKEN LTD.

Human life is valued at the highest… Committed to CLEANLINESS, HEALTH and SAFETY, we, at KOKEN, engage ourselves in creating products with originality and sophistication, and contributing to the society.

In order for us to supply products with proven technology, all employees are required to demonstrate Imagination and Creation, the terms recognized as human dignity. As a consequence, our fundamental managerial policies, “don’t play second fiddle to other competitors” and “research it thoroughly,” are materialized, and innovation in technology and development of unique products are continuously put into practice.

Founded:	May, 1943
Incorporated:	December, 1963
Capital:	JPY 674 million
Fiscal Term:	End of December
Security Code:	7963/Japan Association of Securities Dealers Automated Quotations (JASDAQ)
Representative:	Shinichiro Sakai : Chairman & CEO
Number of Employees:	218 (average age : 37.7) *As of December, 2008.
Descriptions of Business:
1.	Production and sales of occupational personal protective equipment (e.g. particulate respirators, chemical cartridge respirators, SCBA, etc.)
2.	Designing and installation of environmental quality improvement equipment (e.g. push-pull ventilation system).
3.	Production and sales of OXILYZER, acid-electrolyzed water generator.
4.	Production and sales of KAGAMI-NAISHI, automatic endoscope washer.
5.	Sales of EcoBeam, magnetic remover of rust and scales.
6.	Production and sales of AQUA FLASH, soil and groundwater purifying system.
7.	Research and incubation of microorganism.
Business Establishment:
	Head Office:	Tokyo
	Techno-Yards:	Sayama, Gunma, Tokorozawa & Nakai
	(Techno-Yards: KOKEN’s strategical base camps for R&D/manufacturing; coined term implying a creation of originality and value)
	Logistics Center:	Nakai
	Local Offices:	15 cities across Japan
	Laboratory:	Hannou

Koken will consider the value of human life the most sublime matter, commit itself to business related to Cleanliness, Health and Safety that directly governs human life, and provide our society with products based on technology of high originality.
1.	In designing products, Koken will keep customer’s view point, endow the design with performance and safety enough to protect life, and which design meets or surpasses pertinent quality standards.
2.	In producing or manufacturing products, Koken will apply statistic method, keep a condition where production or manufacturing process is fully controlled within a range of scattering or dispersion that can prove it to be sufficient to be reliable.
3.	In designing through production or manufacturing, Koken will always improve its work and produce a condition where a strong competition can be maintained.
4.	Regarding performance and use of products, Koken will keep users always informed correctly of them and make users avoid their misuse.
5.	In process of work, Koken will give first priority to its worker’s safety and health.
		March 28, 2003 Koken Ltd. Hiroyuki Sakai President & COO

1943	Koshinkai Kenkyujo was established by Yoshijiro Sakai, the Founder.
1950	Started the research of occupational safety and health protective equipment.
1952	Koshinkai Kenkyujo was incorporated. A particulate respirator under research passed the national standard.
1963	Koken Ltd. was established and served as an organization in charge of production and sales. Koshinkai Kenkyujo was assigned to conduct research and successfully developed “micron filter,” an electro-static filtering material which presently makes up the mainstream of particulate respirators.
1967	Hannou Laboratory, where basic research has been performed, was established.
1969	Koken was awarded the Award of the Minister of International Trade and Industry for the contribution to the safety of mining.
1972	Koken received a letter of appreciation from the managing director of the technical research department of the then-Defense Agency for cooperation in performing experimental R&D of air-purifying equipment.
1976	Yoshijiro Sakai was awarded the Medal with Purple Ribbon and the Achievement Award of the Minister of Labor, for contribution to occupational safety.
1978	The development of “Alpha-ring filter”, the Japan’s first integrally-molded paper filter with high performance, was completed.
1981	Koken Bosai (accident prevention) System was established and served as an organization in charge of sales. Koken Ltd. was assigned to conduct production and R&D.
1983	Koken received a letter of appreciation from the managing director of the technical research department of the then-Defense Agency for cooperation in performing experimental R&D of new protective respirator and new protective clothing.
1985	Koken completed the merger with Koshinkai Kenkyujo and Ninomiya Production Center and increased its capital to JPY380 million. Koken received a major order of respirators from the then-Defense Agency and successfully established a full-scale production system.
1986	Koken registered its name on the Tokyo Over-the-Counter Stock Exchange Market and increased its capital to JPY644.6 million.
1987	Koken completed the merger with Koken Bosai System. All factories and production centers were re-named to “Techno-Yard.”
1988	The construction of the Sayama Techno-Yard was completed.
1992	Cancer control substance was developed at the Tokorozawa Laboratory and disclosed. New R&D facility at the Tokorozawa Laboratory was constructed.
1995	Koken added Oxilyzer, a strong acid electrolyzed water generator, and push-pull ventilation system on product line, as part of environmental quality improvement equipment-related business. Koken respirators contributed in the recovery operations of the Great Hanshin Earthquake and the Tokyo Subway Sarin Gas Attack. Newly-developed personnel system, or Total Personnel System, was installed.
1997	Oxilyzer was approved as medical equipment by the Ministry of Health and Welfare. The construction of the Nakai Techno-Yard and Nakai Logistics Center was completed.
1999	Entire organization was approved under ISO9001. The construction of the Gunma Techno-Yard was completed. EcoBeam, a non-chemical water treatment system, was added on product line as a part of environmental quality improvement equipment-related business.
2000	Koken’s SCBAs contributed in the recovery operation of the criticality accident at the nuclear power plant in Tokai Village, emergency response operation of the volcano eruption in the Miyake Island, and as emergency measures against dioxins generated in the trash incinerating facilities. Koken Laminar, a unit-type open-style pull-pull ventilation system, was introduced.
2001	Particulate respirators using the newly-developed “Mighty Micron Filter,” corresponding to the new Japanese national assay standard, were introduced. Products for nuclear, biological and chemical (NBC) events (emergency evacuation respirators for NBC attacks and strong acid electrolyzed water disinfection shower system) were developed and introduced.
2002	The Gunma Techno-Yard was approved under ISO 14001 Environment Management System (Assessment registration). Two new products (breath-response PAPR “Breath-Link Model 10” and polluted soil purification system Aqua Flush, using UV-rays and electrolyzed water) with the use of world’s first innovative technology were simultaneously introduced.
2003	The Nakai Techno-Yard and Nakai Logistics Center were approved under ISO Environment Management System (Assessment registration).
2004	Open-draft “Laminar Table HD-01” and breath-response PAPR “Model BL-50” were introduced. Koken canceled the Over-the-Counter registration at the Japan Securities Dealers Association (JSDA) and went public on the Japan Association of Securities Dealers Automated Quotations (JASDAQ) market.
2005	The Tokorozawa Techno-Yard was approved under ISO 14001 Environment Management System (Assessment registration).
2006	“Kagami-Naishi,” a fully-automated endoscope washer, was approved as medical equipment under the pharmaceutical affairs law. “Lifemaster,” emergency respirator for evacuation from fire and special evacuation, was introduced. Koken launched a recycling system of used filters for particulate respirators.
2007	Recycling system of used chemical cartridges was started.
2008	Development of innovative technologies, "Nano-fiber filtar" and "Open clean bench," was disclosed.
2009	Logistics center (now called Saitama Logistics Center) was re-located from Kanagawa Pref. to Saitama Pref.