Incoming International Students KIT-SPJ Guidebook 2018
For safety and health reasons, KIT-SPJ participants are not allowed to engage in activities that are considered risky or dangerous such as skydiving, paragliding, rockclimbing and bouldering during the course of the program including the two "Long Weekends". They are not allowed to drive an automobile or ride a motorcycle either no matter if they bring their international driver's license. Students must take full responsibility for any activities they choose to undertake after the program.
As for alcohol consumption, legal drinking age in Japan is 20 years old or over. Those who have not reached the legal age should refrain from drinking alcoholic beverages.