Abstract
1. Results of one year's (1964-1965) atmospheric pollen survey of the Tokyo Tower (135 m high) by gravity-slide method have been reported. 2. Pollen grains of the 89 species belonging the 48 families were identified. The Pinus thunbergii, Cryptomeria japonica and some street trees being large quantities in March to May, but quantity of ragweed pollen grains was slight in this survey. 3. The influence of temperature, wind velocity and humidity, to the pollen grain counts were studied. Only the humidity was the eminent influential factor on the disparsal.
