This paper presents the measurement- and hindcast-based return values of wind speeds and wave heights at the measurement stations in Tokyo Bay, Ise Bay and Seto Inland Sea. Main findings are as follows. 1)Annual maximum data samples of not only the measured storm surge heights but also the hindcast wind speeds and wave heights indicate the occurrence of their largest values at earlier years in the data period and the resulting non-stationary decreasing trends. 2)The return values of wind speeds and wave heights estimated using both the hindcast and measured data samples are in overall agreement. 3)A year period of the data samples should be taken as long as possible for a proper estimation of the return values. 4)Rough estimates for the 100-year return wind speeds and wave heights are 40 - 45 m/s and 4 - 5 m respectively.
