During a recent stay in Japan, a former top U.S. security official and adviser to then-presidential candidate Donald Trump secretly met and gave assurances to Chief Cabinet Secretary Yoshihide Suga, a high-ranking Japanese official has said.

Michael Flynn, formerly director of the U.S. Defense Intelligence Agency, was visiting the head office of the Liberal Democratic Party in Tokyo on Oct. 11, ostensibly to deliver a lecture on cybersecurity.

During the secret meeting, Flynn assured Suga that Washington would not change its diplomatic emphasis on the military alliance with Japan, even if Trump was elected president, the official said.