Abstract
Computer code (FRESH) was applied to a locally high runup phenomenon at Monai district in 1993 Hokkaido Nansei-oki tsunami. The results are summarized as follows. 1) The computed tsunami behaviors temporally and spatially agree well with an experiment result of 1/400 non-distorted scale-model. 2) The computed runup heights agree with tsunami marks including the maximum height (31.7m) at Monai district. 3) Main factors of the locally high runup are the steepness of tsunami wave, angle between coastline and tsunami attack direction and the configuration of the south valley. 4) In runup area, while water level rises, vertical velocity has large value that is not uniform in a vertical direction.
