54 EIGHTH PACIFIC SCIENCE CONGRESS 



ing northward and southward. From this motion he could determine 

 the velocity of the Oyashio Current (KH, 1, 1950, 10). He also made 

 another attempt to compare the TS-curves of the sea water at various 

 stations and could determine the effect of winds in producing the drift 

 current stations, and could determine the effect of winds in producing 

 drift current (OM, 1951, 97). He also determined the extent of the 

 Oyashio Under Current, which is recognized below the warm water of 

 the Kuroshio (JOSJ, 6, 1951, 202). T. Nan'niti made an attempt to 

 know the year-to-year variation of the Kuroshio and the Oyashio. He 

 says that the Kuroshio was stronger in 1948 and warmer in 1949, and 

 both of these currents were stronger in the period from the spring to the 

 early summer of 1950 (MGP, 2, 1951, 102-111). He also made an at- 

 tempt to compare the curl of wind stress to the intensity of the( Kuro- 

 shio. These two quantity must be proportional according to the Mod- 

 ern theories of the drift currents (JOSJ, 8, 1952, 23-29). 



A very intensive survey of the flowing patterns of the Kuroshio 

 was reported by M. Uda. He describes the fluctuation of the main axis 

 of the Kuroshio and its margins. The maximum speed and the width 

 of the currents were determined based on the dynamic computations 

 carried out during the period 1934 through 1943. He also explains the 

 abnormal phase of the Kuroshio flowing in a loop to the south of Japan 

 as the effect of the monsoon which was very strong in the winter of 

 1934-35 in addition to the strengthening of the intermediate water 

 formed as the extension of the Oyashio after it dives below the warm 

 water of the Kuroshio. He also explains the occurrence, development 

 of this abnormal phase of the Kuroshio and its recovery to normal 

 phase, use being made of the past materials (JOSJ, 8, 1951, 181-189). 

 He discussed the variation of the currents in the Japan Sea, Yellow Sea, 

 and East China Sea and showed that the Tsushima Current begins at 

 the 200 m isobath along the margin of the continental shelf of the cir- 

 culation in the East China Sea (ROWJ, 1, 28-35). Recently Uda de- 

 scribed the result of oceanographic observations in the adjacent seas of 

 Hachijo Island in relation to the fisheries (ROWJ, 1, 1953). 



Currents in the Japan Sea in the spring and summer, 1949, was de- 

 scribed by I. Yamanka, stress being especially laid on the meander of 

 the Tsushima Current which is a branch of the Kuroshio entering this 

 area (JOSJ, 3, 1951, 143). K. Kusunoki described the speed of the 

 currents in the Japan Sea close to the west coast of Hokkaido, northern- 

 most island, and discussed its yearly variation, its periodic cycles and 

 its relation to the fisheries and ice in the Okhotsk Sea (JOSJ, 6, 1951, 

 133-142). 



