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October 2026
Top 5 passive fire protection companies in Japan
Of the 18 passive fire protection companies in Japan listed in the OpenFire directory in October 2026, these profiles were viewed most by people and AI assistants.
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#1
Nippon Rockwool
SprayAce sprayed rockwool structural fireproofing.
Manufacturer 21–100 people Est. 2000 1 officePFP product manufacture Structural fire protectionTokyo, Tokyo View company -
#2
Waku Sangyo East
Greater Tokyo steel fireproofing specialist.
Installer 21–100 people Est. 1968 1 officeStructural fire protectionTokyo, Tokyo View company -
Joint #3
A&A Material
Calcium-silicate fireproofing boards and certified steel encasement.
Manufacturer 100+ people Est. 1924 1 officeCompartment walls & cavity barriers PFP product manufacture Structural fire protectionTokyo, Tokyo View company -
Joint #3
Sekisui Chemical
Fiblock intumescent firestopping for service penetrations.
Manufacturer 100+ people Est. 1947 1 officeFirestopping PFP product manufactureOsaka, Osaka View company -
Joint #3
Yoshino Gypsum
Fire-rated gypsum partition and shaft-wall systems.
Manufacturer 100+ people Est. 1937 1 officeCompartment walls & cavity barriers PFP product manufacture Structural fire protectionTokyo, Tokyo View company
Browse all fire safety companies in Japan →
Companies are ranked by how often their OpenFire directory profile was viewed during the calendar month, by people and by AI assistants. Search-engine crawlers, other automated traffic and link previews are not counted. Companies with equal views share a rank.
A company with offices in several countries, or working across several categories, is ranked in each of them on the same monthly total. A ranking is only published where enough companies are listed and viewed for it to be meaningful.
A ranking reflects interest in a company's listing. It is not an endorsement, and it is not a check of a company's competence, certification or accreditation.