Like MIHASI’s Sunmento Cera has been certified by the Ministry of Land, Infrastructure and Transport Japan as a non-combustible product since 2009, Fireproof-materials are widely used in building materials.
In order to be officially certified as Fireproof-material in Japan, the material must meet 3 conditions as below.

Basic 3 conditions of Fireproof

The material must not burn with a flame.
For fire prevention, the material must not cause harmful damage (deformation, welding, cracking, etc.) .
For safe evacuation, the material must not generate harmful smoke or gas

Material meeting these three conditions is classified as “non-combustible material”, “quasi-incombustible material” or “flame retardant material” according to the length of heating time until it does not meet that condition.

Category

Non-combustible material

Concrete
Brick
Tile
Ceramic tile
Fiber reinforced cement panel
Glass fiber reinforced cement board with a thickness of 3mm or more
Fiber reinforced calcium silicate based ceramic board with a thickness of 5mm or more
Steel
Aluminum
Metal plate
Glass
Mortar
Plaster
Stone
Gypsum board with a thickness of 12mm or more
(Limited to board paper with a thickness of 0.6mm or less)
Rock wool board
Glass wool board

Quasi-incombustible material

1.Non-combustible materials that meet the Basic 3 conditions of Fireproof for 20 minutes after the start of heating when fire heat is applied by a normal fire
2. Gypsum board with a thickness of 9mm or more
(Limited to board paper with a thickness of 0.6mm or less)
3. Wood wool cement board with a thickness of 15mm or more
4.Hard cement wood chip board with a thickness of 9mm or more
(Limited to bulk specific gravity of 0.9 or more)
5. Cement wood chip board with a thickness of 30mm or more
(Limited to bulk specific gravity of 0.5 or more)
6. Pulp cement board with a thickness of 6mm or more

Flame retardant material

1.Non-combustible materials that meet the Basic 3 conditions of Fireproof for 10 minutes after the start of heating when fire heat is applied by a normal fire
2. Flame retardant plywood with a thickness of 5.5mm or more
3. Gypsum board with a thickness of 7mm or more
(Limited to board paper with a thickness of 0.5mm or less)

Since this blog briefly explains the outline of the Japanese Building Standard Act in a simplified manner without its full details, we shall not be liable for any damage caused by this blog.
For the full information, please inquire the Ministry of Land, Infrastructure and Transport Japan by visiting the following link.
http://www.mlit.go.jp/en/index.html