The paper aims to introduce and to discuss seafood import systems in terms of tariff and Non-Tariff Measurements which have been changed by the establishment of WTO. The paper can be used as materials for seafood trade policy making. The Non-Tariff Measurements for seafood import control in Japan are explored as follows; Import Quota, Import License, Pre-identification, Standard system, Customs Clearance Procedure, Import Port Nomination, Import Channel, Unification. The paper is composed of six chapters. Chapter 1 shows the current situation of seafood trade of major countries and background of the research. Chapter 2 deals with fisheries negotiations in the Uruguay Round, their impacts and major issues of tariffs and Non-Tariff Measurements in seafood trade. Chapter 3 analyzes seafood import of Japan, which is the core nation in the seafood trade of Northeast Asian Region, by item and the structure and characteristics of Japanese seafood import tariff including Non-Tariff Measurements. Chapter 4 and chapter 5 tackle seafood import management system of EU and USA respectively. Chapter 6 summarizes the issues of seafood import by focusing on Japan which is the biggest import market of Korean seafood.