“灾后重建”是本专栏探讨的核心话题之一。从灾害大国日本历次的灾后恢复重建看,“重建繁荣”最多持续3～5年,之后无一例外地出现经济下滑。为什么灾后重建不能保持可持续发展?“重建”是如何定义的,又需要怎样的保障机制? “Post-disaster reconstruction ” is one of the core topics discussed in this column. Seeing from the disaster recovery and reconstruction of all the major disaster-hit countries in Japan, the “reconstruction and prosperity” lasted for a maximum of three to five years, after which no economic downturn took place. Why post-disaster reconstruction can not maintain sustainable development? “Rebuild ” is how to define, but also what kind of security mechanism?