Medicine and Clinical Science

In Japan, asthma mortality declined from 1950 to 2019, but halted in 1978 and continued to stall till 1996, plateauing at high levels. Notably, 1978 marked the onset of widespread pollen dispersal in Japan, suggesting increased pollen exposure may have influenced asthma severity, contributing to symptom changes, worsening, and exacerbations during this period nationwidely

Akira Awaya,

Akira Awaya

1) Dermatology & Epidemiology Research Institute (DERI), Yokohama, Kanagawa, Japan. 2) Graduate School of Nanobioscience, Yokohama City University, Yokohama, Kanagawa, Japan.

View author publications
PubMed Google Scholar
Yoshiyuki Kuroiwa,

Yoshiyuki Kuroiwa

1) Department of Neurology and Stroke Center, University Hospital Mizonokuchi, Teikyo University School of Medicine, Kawasaki, Kanagawa, Japan. 2) Department of Medical Office, Ministry of Finance, Japanese Government, Chiyoda-ku, Tokyo, Japan. 3) Department of Neurology, Yokohama City University Graduate School of Medical Sciences, Kanazawa-ku, Yokohama, Japan.

View author publications
PubMed Google Scholar
Tatsuya Yamashita
  10.33425/2690-5191.1158 Published: 31 Dec, 2025
Awaya A, Kuroiwa Y, Yamashita T. In Japan, asthma mortality declined from 1950 to 2019, but halted in 1978 and continued to stall till 1996, plateauing at high levels. Notably, 1978 marked the onset of widespread pollen dispersal in Japan, suggesting increased pollen exposure may have influenced asthma severity, contributing to symptom changes, worsening, and exacerbations during this period nationwidely. Med Clin Sci. 2025;7(4): 58
Download Citation Abstract PDF