In 1948 Hidaka resigned from the chief of the Marine Section, and 

 M. Nakano succeeded his post. Hidaka is now a General Advisor to the 

 Central Meteorological Observatory. Y. Takenouti, formerly working in 

 the Marine Section of the Central Meteorological Observatory, succeeded 

 M. Nakano and became the Director of the Hakodate Marine Observatory 

 in 1947. He, too, is an able ocean ographer and now engaged in the 

 exploration of the sea in the northern part of this country. He has 

 many contributions to the penetration of light through the sea-water, 

 and derived, the extinction coefficients for the water in the adjacent seas 

 and lakes of Japan. 



S. Seki has long been engaged in tidal researches, and published the 

 harmonic tidal constants at many ports along the coast of this country, 

 computed by Tidal Institute method "devised by Dr. A. T. Doodson. 



N. Watanabe was long engaged in the hydrographic surveys in the 

 Marine Section of the Central Meteorological Observatory, and has 

 written several comments on the observations of surfs and waves. 

 J. Sugiura, M. Koizumi, and J. Fukuoka, of the same agency are young 

 observers engaged in the hydrographic work. 



Dr. M. Uda, who has long engaged in a series of hj'drographic 

 researches, was on active service during the war. He came back in the 

 fall of 1945, and is now the director of the Nagasaki Marine Observatory. 



In 1947 he published a paper on the damage by ocean waves, 

 especially by swells. His recent main contributions are, however, the 

 hydrographic studies, the hydrographic conditions as the symptoms of 

 weather change, the unusual hydrographic conditions in 1941 and 1942 

 prevailing over the sea to the east of the coasts, fluctuations of Tsusima 

 Current, turbidity in the adjacent sea of Kyushu, and the discussion of 

 the hydrography of the East China Sea, being the chief work appearing 

 in this 3"ear. He has also been engaged in the studies of the Kuroshio, 

 or the Japan Current, and related current system in the western Japan. 

 His theory of the isolated cold water off the southern coasts of Japan 

 should be especially noted. 



His observator}/ is now very active and publishes synoptic charts of 

 the adjacent seas of Kyushu and south-western part of the Japan Sea, 

 the harbour charts and many useful pamphlets for navigation, fisheries, 

 and others. It has a surveying ship of about 100 tons and a small motor- 

 boat. Oceanographic surveys in the sea adjacent to Kyushu are now 

 being made actively. 



At the Maizuru Marine Observatory the study in physical oceano- 

 graphy is not active now. It has a surveying ship about 100 tons, and 

 a small motor-boat. M. Miyazaki, a young physical oceanographer, 

 published a method of locating the motionless layer in the ocean. The 

 validity of his procedure is not necessarily universal^ acceptable at 

 present ; still a very hopeful future development is expected. 



Activities in the Kyoto University 



The activities in the Kyoto Imperial University is remarkable in 

 these ten years. T. Nomitsu and T. Takegami in 1939 made a series 

 of researches concerning the deep-sea deposits. They examined the 

 influence of salts dissolved in sea- water upon the precipitation of smaU 

 particles suspended, and explained the strip-like multiple-layer suspension 



200 



