Tear 



Oceanographic conditions 



Fishing situation 



1922 A year of low tenperatures, 

 details unknown., 



1923 According to the regular 

 observations the summer was 

 cold and the autumn had high 

 temperatures^ nothing else 

 knowno 



192li July had low temperatures, 

 rising sharply in August, 

 there was a temporary sharp 

 drop in water temperatures 

 in the latter part of August. 



1925 A year of high temperaturesj 

 the lowest was at a point 20 

 miles S of Kushiro, the high- 

 est at a point JO miles So 



1926 Lowest temperatures in 11 

 years 5 middle and lower 

 levels had high temperatures; 

 cold current broad | third 

 branch of warm current did 

 not reach to east of KushirOo 



Kushiro drift nets had poor 

 fishing! situation at Etorofu 

 I, and Funkawan unknown, 



Kyshiro drift nets had poor fish- 

 i ing, mostly large tunai poor 

 fishing at Etorofu I„j situation 

 at Funkawan unknown o 



Kushiro drift nets had poor 

 fishingj, mostly large tunaj 

 Etorofu lo was rather goodj 

 nothing known of Funkawan, 



Kushiro drift nets had good 

 fishingj small tuna rather 

 plentiful, good fishing at 

 Etorofu I „ j nothing known of 

 Funkawan o 



Kushiro drift nets had good 

 fishing, many large tuna; poor 

 fishing at Etorofu I„; good 

 fishing at Funkawan in November; 

 good long-line fishing near Ezan, 



1927 



1928 



A year of high temperatures; 

 the third branch of the warm 

 current flourished; the bot- 

 tom layer of cold water of 

 2oO°C and colder had a wide 

 range o 



A year of high temperatures 

 with the warm currents notably 

 strong in Septembero 



Kushiro drift nets had poor fish- 

 ing, fishing grounds were far- 

 flung; Etorofu lo had the biggest 

 catch in 9 years; good fishing at 

 P^inkawan in November; long-line 

 fishing grounds extended from 

 Shiriyasaki to Shikotan lo, but 

 fishing was poor, 



Kushiro drift nets had good fish- 

 ing in September, many medium 

 and small tuna; good fishing at 

 Etorofu loj good fishing at 

 Funkawan in November; long-line 

 fishing was good, fishing grounds 

 extended to east of Erimosaki, 



2U 



