AMSR-2 observations at 7.3 GHz from Aug. 1 to 16, 2014 over Japan, China and surrounding areas are carefully analyzed. The observations of 7.3 GHz channel in ascending portions of orbits are usually interfered over Japanese land, while no radio frequency interference (RFI) detected in descending passes. The signals emanating from geostationary communication and television satellites that reflect off the land surface are the major interference sources of these RFI. Besides 7.3 GHz, the measurements of 6.9 GHz and 10.65 GHz over Japan are all affected by RFI. These RFI signals are all from ground point target sources, being isolated in space and persistent in time. Strong and wide RFI are detected every day in Vietnam in both ascending and descending orbits. Both 7.3 GHz and 10.65 GHz information are all contaminated over China. The cities and areas affected by RFI at both frequencies are identical with the distribution of Chinese ground-based radar stations.