“以西底拖网渔业”系指在东经128°30′以西的东海,通常用对船拖网,以捕捞底层鱼类为主的渔业。在最盛期的1955年,日本在下关、户畑、福岗、唐津、长崎等5个基地,总共拥有769艘渔船,年产量近40万吨。然而,最近因减船、停业等因素,船只已减 “Trawling to the west” means the East China Sea west of 128 ° 30 ’east of which fishing trawlers are usually used to catch bottom fish. In its peak in 1955, Japan had a total of 769 fishing vessels at 5 bases including Shimonoseki, Hoken, Fukang, Karatsu and Nagasaki with an annual output of nearly 400,000 tons. However, the number of vessels has been reduced recently due to factors such as reduction of vessels and business suspension