Japan's foreign minister has urged his Iranian counterpart to halt action that would undermine the 2015 nuclear agreement between Iran and six world powers.
Toshimitsu Motegi held a telephone conversation with Iran's Mohammad Javad Zarif on Wednesday.
The International Atomic Energy Agency confirmed that Iran resumed uranium enrichment at an underground nuclear facility on November 9, in violation of the agreement.
Zarif explained his country's stance, saying that the economic benefits promised in the nuclear deal have not been secured because of sanctions by the United States.
Motegi also called on Iran to fulfill its responsibility as a nation on the Persian Gulf basin, on the grounds that safety of shipping in the region is extremely important.
Motegi added that Japan will continue diplomatic efforts to ease tensions in the Middle East. Zarif responded that he wants to closely communicate with Japan.