The Second Japan and East China Seas Study (JECSS) Workshop, which was held April 22–27, 1983, at Tsukuba University, Japan, will publish proceedings in spring 1984. Convened by Takashi Ichiye (Texas A&M University) and Kenzo Takano (Tsukuba University), the purpose of the workshop was to assess oceanographic research of these seas, including modeling and observational techniques, and to promote the cooperation of oceanographers in studying the marginal seas. The Workshop was supported by IBM Japan and the Japan Marine Science and Technology Center (JAMSTEC) and also sponsored by AGU, the Oceanographical Society of Japan and the Japanese-French Oceanographic Society. The JECSS program has been designated as a program that contributes to the objectives of WESTPAC, the IOC-UNESCO international program.