We investigated the relationship of pollen counts of Japanese cedar to 9 different weather factors including means of the highest, and lowest temperatures, variation in temperatures mean of the lowest humidity on a day, daily mean, maximum wind velocity and daily wind direction in 1991, 1992, 1993 and 1995 Prefecture. The results were as follows : 1.In each year, the highest temperature and the mean humidity were statistically related to the maximum pollen counts of Japanese cedar in the air. 2.Mean pollen counts per day on the days that the wind from the southwest were much higher than on the days with wind from the south. 3.These wind directions coincided with the dense plantation areas of Japanese cedar trees around Isehara City. We concluded that in terms of accurate daily forecasting of pollen counts in the air in a certain area or city, it should be taken into consideration that the highest temperature, and mean humidity together with the wind direction from the area of dense population of Japanese cedar trees surrounding the area are closely related to the increased pollen count per day.Key words : ceder pollen counts of Japanese ceder, 9 weather factors, the highest temperature on a day, mean humidity on a day, daily wind direction

A new collaborative environnient has been constructed recently. in which a human-shaped virtual agent can comm.unicate with a real human through both verbal and nonoerbal ways. The collaborative environment is very promising as the nezt generation communication environment, but there exists a problem the workload for the construction is too large for the practical use. In this study, the system for siinulating the collaborative environment is divided into several subsystems according to its function: and for each subsystem a new constmction method to reduce the constmction workload has been. developed individually. In this paper, newly developed construction methods are described such as an object-oriented method for constructing virtual spaces, an affurdance-based body motion synthesizing method and a modeling method of the virtual agent's behavior using Petri-net.