The ecology of loggerhead sea turtles was studies along the coast of Miyazaki Prefecture, in southeast Kyushu, for 9 years (1976-1984). The number of turtles coming ashore fluctuated from 79 to 532 (χ^^-=278) in number per year along a seashore 15.9 km in length. Intra-seasonal fluctuation in the number of turtles landing and nesting shows a weak two to three week periodicity. This interval was similar to that of the renesting of individual turtles. Turtles tagged from 1977 to 1983 were recaptured mainly in the East China Sea, but two turtles remigrated to Miyazaki after 2-year absence. These data suggest that turtles nesting in Miyazaki migrate to the East China Sea after the breeding season and some of them come back in a few years.
