Plutonium deposition has been continuously observed in Meteorological Research Institute (MRI), Japan since 1958. After 1985, the annual ^239,240Pu deposition in Tsukuba ranged from 1 mBq m^-2 to 10 mBq m^-2, which cannot be explained by stratospheric fallout. Resuspension of ^239,240Pu-bearing soil particles is a candidate of ^239,240Pu source supporting the ^239,240Pu deposition. Recent artificial radionuclide deposition studies reveal that Asian dust, so called "Kosa" is one of origin of ^239,240Pu in recent deposition samples. We present here recent ^239,240Pu deposition observed in Tsukuba and discuss causes of its variation. The annual 239,240Pu depositions in 2001 and 2002 were 7.77 mBq m^-2 and 7.44 mBq m^-2, respectively, which were the highest level during the past 15 years. The annual ^239,240Pu deposition in 2003 decreased to 3.09 mBq m^-2, which was about half of previous years. The monthly ^239,240Pu deposition in 2001 and 2002 showed a marked seasonal variation with a spring maximum. On the other hand, the monthly ^239,240Pu deposition in 2003 showed no clear seasonal trend, although higher ^239,240Pu depositions occurred in February and March. The Kosa events in Japan were remarkable in 2001 and 2002, whereas it was rarely observed in 2003. These findings suggest that the temporal trend of the Asian dust is closely related to that of the ^239,240Pu deposition in Japan.