Abstract
The purpose of this paper is to estimate benefits of (unknown) mortality risk reductions caused from tsunami disaster. Individuals' perceived risks were asked and set as mortality risks in contingent valuation questionnaires. As results, individuals' willingness to pays ranged from 657 yen to 2,976 yen under their perceived risks which ranged from 0.3 per 100,000 people to 2.3 per 100,000 people. Finally, it was shown that these values were as same as values of benefits from mortality risk reductions of water accidents.