ニチアス株式会社 is a listed insulation and fireproofing manufacturer whose Makibee (マキベエ) wrap-type heat-resistant rockwool system is certified as 耐火構造 by 国土交通大臣認定, holding FP060, FP120 and FP180 beam and column certificates published on its Makibee technical site, with further 1.5-hour and 2.5-hour beam certifications added in 2023. Makibee is installed only by NICHIAS-registered applicators working under the named 認定工法, and the group also supplies sprayed rockwool through its Nippon Rockwool subsidiary.