to about 10 miles off Erimosaki and then further divides into two branches, 

 one of which goes to the Kinkazan area while the other runs from the 

 Hitaka coast to Ezansaki and Shiriyasaki, This is tentatively called the 

 coastal stream. 



The latter passes 30 to 50 miles south of Kushiro, reaches a point 

 about UO miles south of Erimosaki, and then heads for the Kinkazan area, 

 Ihis is tentatively designated the second current, and it sometimes 

 divides into two branches. 



Number 3 moves south farther off shore than the second current, and 

 flows down to the southwestward about 160 miles south of Kushiroo This 

 is tentatively designated the third current, Ihis is the pattern of the 

 Chishima cold current. 



b. Pattern of Warm Currents on the Pacific Coast of Hokkaido (Summer) 



In May and June the Kuroshio warm current reaches the waters off 

 Cho"shi and flows by in ein approximately easterly direction. In July it 

 is affected by the southerly seasonal winds and develops a branch which 

 reaches into the waters off Kinkazan, In August this zone reaches to 

 roughly the vicinity of kO N where it is split by the third stream of 

 the cold current, one branch turning eastward while the other continues 

 north. The former is tentatively termed the first branch of the warm 

 current. The northbound branch is bisected by the second stream of the 

 cold current off Erimosaki, and one stream turns toward the off-shore 

 waters about 100 miles south of Kushiro while the other approaches 

 Erimosaki and turns toward the waters off Kushiro. The former is tenta- 

 tively designated the second branch and the latter the third branch. 

 The third branch mingles with the Tsugaru warm current o 



Ihe above, if one looks from the Kushiro shore, are arranged from 

 the coast toward the open sea in the order of the coastal stream of the 

 Chishiraa cold current, the third branch of the warm current, the second 

 stream of the cold current, the second branch of the warm current, the 

 third stream of the cold current, and the first branch of the warm cur- 

 rent. Hiis arrangement is shown in figure 3o 



c. Characteristics of the Oceanographic Conditions During the Past 10 

 Years 



1922, — ^A, year of low tenperatures in the off-shore waters. 

 September was the season of highest temperatures. According to the 

 regular observations it was a year of high temperatxires on the coast 

 in July, August, and September, 



1923, — ^No transverse observations were taken and conditions off 

 shore were not clear. According to the regular observations temperatures 

 were low in July, August, and September, but they were high from 

 October on, 



16 



