阿部興業株式会社 produced Japan’s first domestically certified timber fire door in 1991 and remains a specialist in design-led wooden fire doorsets, sliding fire doors and acoustic doors for hotels, apartments and public buildings. Its sa-fire range carries 国土交通大臣認定 as 特定防火設備 with 60-minute 遮炎性能 under approvals EA-0439(1) for the V65 series and EA-0456 for the V66 type. Manufacture is at Sayama, Saitama, with regional sales bases across fourteen prefectures.