Incoming International Students KIT-SPJ Guidebook 2018
Although KIT has a clinic on campus, take any medicine with you that you think necessary during your stay in Japan. Also, consider taking prescription of the medicine and, if you wear glasses, that of glasses as well to be on the safe side.
Do not bring illegal drugs with you or have someone send you illegal drugs from abroad during your stay here. This includes marijuana, which is strictly forbidden in Japan. Illegal drug use carries stiff legal penalties and social stigmas in Japan.
Although most non-prescription drugs (over-the-counter-medicine) such as aspirin and cold medicine can be brought in Japan as long as the amount does not exceed the use of more than 2 months, some sleeping pills may contain certain illegal substances. Contact Customs to check if you can bring in a particular type of drugs.