(b) Around the sunken reefs in the vicinity of Okinoshima big catches are 

 made fuffiffl April to June in years when the current through the Osumi Strait 

 strikes in strongly to the coast at Ashizuri Misaki and the water temperature 

 is about 20°C„ 



(c) In years when the Kuroshlo comes in weakly toward Muroto Saki, catches 

 are made only around April when the water temperature is about 20°C„ and only 

 in the waters 30 = 4O miles off M^roto Saki, that iSy in the vicinity of 

 Taisho-bai, 



(d) Schools come into Tosa Wan and are caught there in July and August„ 

 The water temperature gets up to around 25 Co 



(•) Off Kumano Nada the season for spring skipjack opens in March, is at 

 its peak from April to May, and ends in June, In s-ummer and autumn the 

 schools are greatly decreased in number, but catches continue to be made. 

 The schools in this area come in close to the coast and are fished in 

 waters 20 to 30 miles off shore from Shiomisaki to Owase when the water 

 temperature is about 19°Co In the peak season catches are made from 50 

 miles south to 100 miles southeast of Shiomisaki and activity increases 

 as the fish gradually come closer in to the coast of Kumano Nada^ In the 

 latter part of May the schools diminish and fishing ends in June„ The 

 average water temperature is about 19 - 22°C„ 



3 J Zunan area 



Fishing in this area centers around the Izu Shichito, the waters 

 around Hachijojima and Ogasawara being especially famouSo The fishing 

 season begins in the Ogasawara area in February, and at Hachijojima 

 and Aogashima in March, the peak of the season being from April to June. 

 By April the fishing grounds extend to the waters off Boshu, and they 

 gradually shift to the Sanriku area„ Fishing grounds are found at the many 

 reefs within a line drawn from Aogashima south of Hachijojima through 

 Nishinoshima west of Ogasawara to Kita Iwojiraao 



Among these fish reefs the most notable ones are Higashiba, Satomae, 

 and Nishlbaj all on the ftorth side of Torishima, and the waters around Sofu 

 Iwa, as well as Kaikataze, Kaitokuze, and Zenisu on the south side of 

 Nishinoshima^ These are all within the 30 to 100 fathom lineSo In this 

 area a distihction is drawn between sedentary skipjack and migratory fish. 



The season generally begins in March or April, is at its height in 

 June and July, and ends around October,. 



Around May in the Sofu Iwa, Aogashima, and Sumisu Shima areas the water 

 temperature is 20° to 22°C„ In the middle of the month the fishing grounds 

 shift to the westward. The peak season of the early part of May is centered 

 60 miles east of Hachijojima around 31° N - 139° E, and 32-33° N - 138-U0°E. 

 In the latter part of the month the center of the fishing grounds shifts 

 to the east of Izu, particularly to the waters around 33° 20' ~ 3U^ /^O'N — 

 1/^.0° = niC' 30" Eo Suitable water temperatures for fishing in this area 

 appear to be 19 - 22°Co 



^8 



