Japanese cedar and cypress airborne pollen counts were measured using a Durham-type pollen sampler, an IS-Rotary-type pollen sampler, and a real-time pollen counter (KH-3000; Yamato Manufacturing Co., Ltd., Japan) at Toyoake city, Aichi, from 2001 to 2004.
The pollen counts measured by the real-time pollen counter were significantly correlated with those measured by both the Durham-and IS-Rotary-type pollen samplers. According to the real-time pollen counter data, the weather conditions that led to an increase in the airborne cedar and cypress pollen counts of during the cedar and cypress pollinating seasons were higher temperatures, higher wind velocities and lower humidity. We believe that the real-time pollen counter may be a useful tool for research on airborne pollen and pollinosis.
