Strong-motion earthquake network in ports areas in Japan consisted of 69 stations in 46 ports as of March 1978. This report presents site data on 16 stations newly installed and 4 stations relocated in the network in 1972 through 1978. This is the fourth issue in thisseries.
　The site data of each station are composed of three kind of three kinds of maps showin instrument location, geological condition, and structures around the station; figures of instremeneo foundation and house; boring log; and a table in which address, office maintaining strument and instruento constant are gibe.