At first the government asked the U.S. military to stop construction, but the U.S. refused and the government gave in. The Japanese government is also officially noncommittal to U.S. and U.N. pressure about sending Japan Defense Forces overseas so far, in part no doubt due to the extremely well-organized opposition they face from the broad coalition of organizations throughout Japan which are campaigning to retain the Peace Constitution. The government renounces war but does not renounce nuclear weapons. In fact, it has a new agreement with the U.S. to join research in developing plutonium. Japan has developed much high-tech equipment in joint research with the U.S. which ultimately is used for military purposes.
Japan says the export of arms is strictly banned.
But high technology can't be strictly defined as weapons or peace. In the 1980's India proposed to the United Nations making the Indian Ocean a Zone of Peace.