Heated tobacco products (HTPs) were introduced in Japan in 2014 without sufficient scientific evidence about the associated health risks. Our previous report found substantial HTP use in Japan after 2016.
We calculated the prevalence of HTP use from 2015 to 2019 from the JASTIS dataset. At baseline in 2015, 8240 participants aged 15–69 years were randomly selected from a Japanese large internet search agency, Rakuten Research.