KOKEN LTD.

Japan

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KOKEN LTD. was founded in May 1943 and incorporated in December 1963. Listed on the Tokyo Stock Exchange (Standard Market: 7963), the Tokyo-headquartered enterprise specializes in occupational respiratory protective equipment and advanced environmental clean air systems. The company operates manufacturing and technology centers including Ranzan Techno-Yard and Sayama Techno-Yard in Saitama Prefecture, as well as an international subsidiary in Thailand.

Koken is known for developing the “KOACH” series of open clean air systems, which generate local ISO Class 1 ultra-clean air environments without requiring fully enclosed walls or ceiling plenums, utilizing opposing push-hood laminar flow aerodynamics.

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KOKEN LTD. manufactures contamination-control equipment and protective personal devices:

KOACH Open Clean Air Systems: Stand KOACH (C 645-F, C 900-F, C 500-F) and Floor KOACH systems that generate an ISO Class 1 cleanroom environment within minutes using colliding opposed laminar airflow vectors without walls or ceilings.
Table KOACH (T 500-F): Compact, portable benchtop clean workstations capable of achieving ISO Class 1 clean zones in under two minutes for micro-assembly, laboratory compounding, and inspection.
ESD & Antistatic Integration: Table KOACH units feature optional transparent acrylic safety shielding fitted with high-voltage ionizers to eliminate electrostatic charges and airborne dust attraction simultaneously on sensitive components.
Nanofiber Filtration (FERENA): Proprietary electrospun nanofibrous main filters capturing airborne particulates down to 0.1 µm.
Occupational Safety Gear: Industrial particulate respirators, chemical cartridge respirators, powered air-purifying respirators (PAPR), and face shields.

KOKEN LTD.

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