Certified in Japan Against Sick Building Syndrome (F☆☆☆☆)
F☆☆☆☆ (F Four Star) is a mark that indicates the highest level of protection against formeldehyde emissions.
The Japanese Industrial Standards Comittee (JIS), Japanese Agricultural Standards Comittee (JAS), and Japan's Minster of Land, Infrastructure, Transport and Tourism created this star-based ranking for measuring formeldehyde emissions, with F☆☆☆☆ (F Four Star) being the highest possible rank and an indication of products that release the lowest amount of formeldehyde.
Fire-proof Certified in Japan (Quasi-Noncombustible)
Japanese flammability standards were established by the Minster of Land, Infrastructure, Transport and Tourism to certify materials as Noncombustible, Quasi-Noncombustible, or Fire Retardant based on their performance when exposed to flame.
The criteria for Quasi-Noncombustible materials are as follows:
when exposed to heat equivalent to that of a normal house fire, the material does not combust after 10 minutes; exterior finishings do not warp, melt, or crack; interior finishings do not emit harmful gases or smoke during evacuation.
Fire resistance is not something that is determined by the wallpaper alone, rather it is a mix of the wallpaper, the material of the surface it is hung on, and the way it is hung. This means that the same wallpaper can be more or less effective at resisting fire depending on the circumstances.