In Japanese Pediatric Guideline for the Treatment and Management of Asthma (JPGL) 2017, the data on the prevalence, progress and comorbidities of asthma were updated from JPGL 2012 with additional data on the mortality, admission and control of asthma.

 Recent large epidemiologic studies have shown that the prevalence of asthma is not increasing in Japan, which is similar to what is found in other countries with high prevalence. Since JPGL 2000 has been published, the mortality and admission of childhood asthma is dramatically decreasing. However, results from epidemiological studies present issues concerning the treatment for younger children with wheezing symptoms.