Abstract
Multiplier effects are expected with such a public policy as to lead the private sector to continue paying in a long term for costs against disasters without withdrawal from bank accounts with strict economy. Since disaster risk-off will not last long, it is necessary to elaborate so that the private sector continues to pay for the costs even at succeeding risk-on. Such a policy would have an option of mitigation of one-pole concentration into Greater Tokyo, namely risk diversion toward the Japanese frontiers.
