Kinkazan. Off Inubozeuki the current flows 

 northeast near the coast with considerable 

 strength, producing water temperatures 

 about 17°C. even below the depth of 300 m. , 

 but off Kinkazan it is spread out in a shallow 

 layer on top of the Oyashio and the water tem- 

 peratures are markedly lower. Just north 

 of the section line running due east of Kinkazan 

 Figure 4. --Vertical tern- there is afront running in anortheasterly direc- 

 perature section due tion and marking the northernmost limit of the 



east of Cape Inubo. Kuroshio. Between 35 N. and 38 N. the 



Kuroshio turns to the east to northeast, eind 

 since we have no data on sectional observations through this area of east- 

 ward deflection we cannot clarify its structure. However, east of the 

 areas shown in figures 3 and 4, the isotherms become complex and, when 

 we consider the existence of what are thought to be isolated water masses, 

 it appears that considerable mixing is going on. 



The direction of flowof the currents in the area where the Kuroshio 

 turns eastward is quite connplicated, and it is thought that this sort of mixing 

 extends all across this area. We have little data on the northern edge of 

 the eastward-flowing North Pacific Current, and there are many points 

 which are not clear about it; it has already been noted that from the iso- 

 therms we can detect a large number of large and smcLll vortices in the 

 North Pacific Current and in the counter cur rent region on its south side. 

 Most of these vortices run clockwise. 



(ffl) 



300 



Figure 5 shows the results 

 of sectional observations extending 

 300 miles southeast of Cape Nojima 

 nnade in 1936. An area about 150 

 nniles off the coast corresponds to 

 the vicinity of the boundary between 

 the Kuroshio and its countercurrent, 

 and farther offshore the area of vor- 

 tices appears. Low -temperature 

 water masses thought to have been 

 produced by these vortices are also 

 apparent. For the North Pacific Current, which is farther offshore to the 

 eastward of the area shown in figure 5, ajid for the countercurrent area on 

 its south side we have no suitable data and the structure is not clear, but 

 it is thought to be quite complex. 



Figure 5. --Vertical temperature 

 section 300 nniles southeast of 

 Cape Nojima. 



Table 4 presents the results of observations made on fishing grounds 

 west of Midway IslaJid in Jcinuary 1951, 



64 



