Introducing the First Fireproof Door with Heat Insulation Certification from Japan's Minister of Land, Infrastructure, Transport and Tourism Sanwa Shutter's innovative heat-insulating door, 'Shakunetsu Guard,' achieves a ministerial certification for 60 minutes of thermal insulation, setting a new industry standard.

Introducing the First Fireproof Door with Heat Insulation Certification from Japan's Minister of Land, Infrastructure, Transport and Tourism #Japan #Itabashi #Sanwa_Shutter #Shakunetsu_Guard #Heat_Insulation