Aim: We determined Japanese cedar pollinosis morbidity in Oshimamura, Hirado City, Nagasaki Prefecture, where cedar forest area is roughly 1%. Methods: Using a questionnaire, we surveyed the 608 households of 1438 Oshimamura residents and examined correlations of Japanese ceder pollinosis, food trends, and length of residence from July 7 to September 22, 2009. Results: Questionnaire recovery was 73.5%. Cedar pollinosis morbidity was 2.65% and significantly lower in those residing more than 6 years than in those residing less than 5 years (χ-square test: p=0.0019). Conclusion: We speculated that low cedar pollinosis morbidity was linked to area's low cedar fores ratio.
