Forty-four men of the 20th Japanese Antarctic Research Expedition (JARE-20) left Tokyo for Syowa Station on November 25,1978 aboard icebreaker FUJI to carry out scientific observation. Emphasis was laid on two 3-year projects : the POLEX-South and the integrated earth sciences programs which started in 1979. Scientific observations in the summer season were oceanographic observations along a cruise track and during mooring in the fast ice area near Syowa Station, deep seismic sounding of the earth's crust, and geological and geodetic surveys of the ice-free Kasumi Rock. Seven Australian drifting buoys for the First GARP Global Experiment were deployed between 39°S, 109°E and 62°S, 85°E. At Syowa Station construction of the basement of two-s...