Cannabis has been legalized in some parts of the world, but Toshiro Muto, the chief executive of the Tokyo Olympics, reminded potential visitors to the games that the substance is against the law in Japan.
Muto said at a news conference that at least one member of the executive board brought up the issue at a meeting.
"There are countries and some regions around the world that have relaxed rules recently," Muto said, speaking through an interpreter. "Unfortunately, the use of cannabis constitutes a violation of law and that needs to be thoroughly communicated."
Cannabis is among banned substances listed by the World Anti-Doping Agency for athletes at next year's Tokyo Olympics.