株式会社和久産業イースト is a dedicated 耐火被覆工事 and insulation contractor working across Tokyo, Chiba, Saitama and Ibaraki. It is a full member (正会員) of the Rock Wool Association and works under the individual 国土交通大臣認定 耐火構造 (FP) approvals for 吹付けロックウール被覆 issued to association members in their own names, having previously worked under the association’s 通則指定. It also holds Tokyo Governor construction licence No. 148416.