三和シヤッター工業株式会社 designs, manufactures, installs and maintains fire shutters, specific fire-protection doorsets (特定防火設備) and steel doors nationwide. Its ministerial-approval register lists 国土交通大臣認定 numbers including EA-0549 for a single-leaf glazed doorset and EA-0544 and EA-0545 for the Fired LD lightweight steel doorset, and its fire-and-smoke shutter is separately certified as a 遮煙性能を有する防火設備 under CAS-1137. It also runs a 防火設備定期検査 service line for Art.12 periodic reporting.