About SHIMOSAKO KEN'ICHIRO
About Tohoku District
About large earthquake
About tsunami
About breakwater
About suffering
About scour
About precast concrete armor unit
About caisson
About weight (gravity)
About wave force
About water level
About rubble
About foundation
About Ocean waves,tidal current
About Coastal engineering
About 津波
About 現象
About 流体力学
About 東北地方太平洋沖地震
About 防波堤
About 被災