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In 2016, Canada Wood and the Japan 2x4 Home Builders Association jointly obtained a series of five two-hour "fireproof" approvals from the Ministry of Land, Infrastructure, Transport and Tourism for 2x4 exterior walls, standard and double Midply partition walls, party walls and floor assemblies. As a result, platform-frame construction in Japan now allows the height of wood buildings to rise from four to six storeys. The culmination of this joint technical project opens the market for wooden mid-rise construction in Japan.