An advance of the computing technology has evolved climate projection calculations. Resolution of global climate models becomes higher and has reached to several tens of kilometres. Mesoscale models enable to simulate cumulus cloud convection have been developed and applied to extreme weather systems. This study directly uses the downscaling of climate change experiment by high-resolution non-hydrostatic Regional Climate Model with 5km grids (RCM5) for the simulations of storm surges to assess impacts of future change of storm surges around coasts of Japan. Increment of storm surge will not take place uniformly and there are strong regional dependencies influenced by typhoon track and intensity change. Return periods of storm surges will change significantly in the future climate especially in the western Seto Inland Sea, Japan.
