In 2023, the standardised rate of male deaths due to asthma in Japan stood at 400 per hundred men. From 2024 to 2026, this rate is forecasted to remain steady at 400. However, a significant decrease is projected from 2027 onwards, dropping to 300, indicating a reduction of 25% in asthma mortality by 2028. The compound annual growth rate (CAGR) from 2024 to 2028 suggests an annual average decrease in the mortality rate.

Future trends to watch for include:

Advancements in medical treatments and therapies that could further reduce mortality rates.
Public health initiatives focusing on air quality improvement and healthcare accessibility.
Potential impacts of climate change on asthma prevalence and severity.