Japanese cedar pollen, which causes hay fever, will increase between 1.3 times and 2 times this spring due to hot weather last July, the Public Health Bureau of the Tokyo Metropolitan Government warned Jan. 17.Because temperatures have been relatively high this winter, large volumes of pollen are expected to start circulating at the beginning of February, which is earlier than normal, officials said. On Jan. 17, the metropolitan government began a telephone service to issue the Tokyo pollen count and other information related to pollen and hay fever. It will update the data twice a day.The information line is (03) 5272-1187. The Japanese-language service will continue until late April, when pollen circulation usually stops, the official said.