Shirahama, one of the most famous hot spring resorts in Japan, is often affected by typhoons and is subject to severe wind and wave conditions. The observation tower of the Shirahama Oceanographic Observatory (SOO), Disaster Prevention Research Institute (DPRI), Kyoto University takes field measurements of meteorological and oceanographic phenomena. Such field data is crucial to understanding various phenomena in coastal regions. Field data of severe wind and wave conditions is particularly scarce because of the difficulty in obtaining it. The data gathered by the observation tower therefore has an important role to play in investigating coastal processes such as air-sea interaction. The long-term continuous measurement provided by the observatory contributes to a multidimensional understanding of coastal processes caused by numerous factors, including the Black Current.