Introduction:
In accordance with the enforcement of the revised Health Promotion Act in Japan, smoking has been prohibited in principle on the premises of the university since July 1, 2019. Doshisha University has confirmed its policy to complete the process of an all-campus smoking ban by March 31, 2020.

Objectives:
The purpose is to examine the effect of a questionnaire giving information about tobacco in order to excuse the campus smoking ban smoothly.

Methods:
We use self-administered anonymous questionnaires to give information about tobacco to the university staffs annually since 2017. We presented the 11 facts about tobacco and asked if they know or not. Smoking status and the style of using tobacco products including Heat-Not-Burn cigarettes (HNB) were inquired. We compared the results of the questionnaires carried out in 2017, 2018 and 2019.

Results:
The proportion of daily smokers was always around 5%, intermittent smokers 1%, ex-smokers 20%. Only cigarette users were 80% in 2017, 55% in 2018 and 66% in 2019 among daily smokers. Only HNB users were 11% in 2017, 17% in 2018 and 17% in 2019. Both cigarettes and HNB users were 9% in 2017, 26% in 2018 and 12% in 2019. The facts that less than half of the staff knew (e.g. “tobacco smoke contains 4000 to 7000 chemicals and more than 200 substances are hazardous.” or "tobacco and HNB contain PM2.5") remained unknown in all three questionnaires. Eighty percent knew about Doshisha University declaration of all-campus smoking ban.

Conclusion(s):
The number of smokers does not decrease. It is not that the number of HNB users continues to increase. The level of knowledge about tobacco has not improved. Despite the declaration of all-campus smoking ban, still twenty percent does not know about it. A lot of effort is necessary to make the staff understand the significance of smoke-free campus policy.