Extra framework was required for wooden structures. - See more at: http://japanpropertycentral.com/real-estate-faq/earthquake-building-codes-in-japan/#sthash.4XjqDL19.dpuf
- See more at: http://japanpropertycentral.com/real-estate-faq/earthquake-building-codes-in-japan/#sthash.4XjqDL19.dpuf