日本金枪魚漁业有鰹鱼竿钓和金枪魚延绳钓两种。1937年前以竿钓为主,自1952年起金枪魚延繩釣作业迅速扩展,現已成为日本最重要的远洋漁业。日本金枪魚漁业在世界金枪魚漁业中占极重要的地位,漁获量占世界金枪魚总产量的一半以上。近几年来,日本金枪魚产量逐年均有增长,到1962年已达72万吨(为世界金枪魚总产量的70%以上)占日本海洋漁业总漁获量的11%,而其中延繩釣漁业捕获的约为53万吨。日本金枪魚延繩釣漁业的产量平均每年约增长16%。現将日本历年金枪魚延繩釣漁业的产量列入表1(单位:吨)。日本金枪魚延繩釣的作业类型有四:(1)单船作业(以本国为基地);(2)国外基地作业(在太平洋和印 Japanese tuna fishery there are pike fishing rod and tuna longline two. In 1937, pole-fishing was the mainstay. Since 1952, the longline fishing of tuna has rapidly expanded and has become Japan’s most important offshore fishing industry. Japanese tuna fishery plays a very important role in the world’s tuna fishery, catching more than half of the world’s total tuna production. In recent years, the output of Japanese tuna has been increasing year by year, reaching 720,000 tons (more than 70% of the world’s total tuna production) by 1962, accounting for 11% of the total catch of Japan’s marine fisheries, Rope fishing caught about 530,000 tons. The output of Japanese longline and longline fisheries is on average about 16% annually. The production of tuna longline fisheries in Japan over the calendar year is now tabulated in Table 1 (unit: ton). There are four types of operations for Japanese tuna longline fishing: (1) single ship operations (national basis); (2) overseas base operations (in the Pacific Ocean and India