However, the fact that vaping is relatively scent- or taste-free, and that it can even have flavors that are appealing, makes it much easier for adolescents and teens to use it without coughing, gagging, or feeling self-conscious about their smokers smell. They also dont have to worry that their smell will give them away to parents, caregivers, or other authority figures
For spitting out tobacco, a 'spittoon' was commonly used
If you want to plan ahead, find a list of restrictions at the Japan Customs website
In The Bureau of Investigative Journalism, 3/20/2020
Industry documents indicate that the tobacco industry has engaged in widespread activities, however, that have gone beyond the bounds of accepted scientific practice (Glantz 1996