In 2004, ten typhoons landed on Japanese main islands and some of them triggered sever stormsurge and wave-induced disasters. This paper presents the characteristic of the major typhoons andstorm surges and discusses on the accuracy of a typical storm surge simulation model from theview of real-time forecasting and hindcasting. The major conclusions are as follows:
　(1) The number of the typhoon landfalls may be related with the latitude of the origin of thetyphoons and the layout of atmospheric systems around Japan. The radius of the maximumwind speed of Typhoons 0421 and 0422 is smaller than the averageover these severaldecades and that of Typhoons 0416 and 0418 is quite larger.
　(2) Typhoons 0416, 0418, and 0421 caused severe storm surges in bays locating between thewest coast of the Kyushu Island andthe southeast coast of the Honshu Island. The magnitudeof the storm surge due to Typhoon 0418 exceeded 2 meters in Ariake, Suo-nada, andHiroshima Bays.
　(3) Exact estimation of typhoon parameters is most essential for precise storm surge forecasting.The marine surface wind field considering supergradient wind and the effect of landtopography is examined as an input for storm surge hindcasting.