Deep-Sea Pishing Off the East Coast of Japan . In the summer 
months the operations are largest. These follow the northward migra¬ 
tions of Scombroids, sardines and other species. As Figure 2 shows, 
however, there are many seasonal variations within this vast area. 
Trawling in the China Sea . This is limited to Octoherl— June 1 
north of 25 ° N. and to May 1 — November 1 south of 25° N. 
Antarctic whaling . In 1937-1938 this was limited to November 1 — 
March 16 by Japan. The season for other nations was December 8 — 
March 15. (See page 115) 
Areas and Seasons of the Northern Region by Species 
In the northern cold waters, roughly north of 40°, herring, cod, 
salmon and crab are the mainstays of the Japanese fisheries. The 
southern part of this area — northern Honshu, Hokkaido, the Kurile 
Islands and Karafuto — are Japanese territories whereas the northern 
part of the area — Sakhalin, Kamchatka and the Siberian Coast are 
Soviet areas. 
Herring (nishin) is the leading product of the cold waters and 
next to sardines the largest Japanese fish catch. Herring are most 
abundant from northern Sakhalin to Aomori Prefecture, particularly on 
the western side of the former island, but occur in lesser numbers much 
farther south along the coasts of Japan proper and Korea. The southern 
limit on the Pacific coast is about 37° (Fukushima Prefecture) and in 
the Sea of Japan on the east about the latitude of Sado Island and on 
the west about 35° (Pusan City in Korea). 
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