TOKYO: Japan has expressed “serious concern” over Iran’s decision to suspend cooperation with the International Atomic Energy Agency.

“Japan attaches great importance to the activities of the IAEA in verifying Iran’s nuclear program and expresses serious concern over this announcement,” the country’s Foreign Ministry said on Thursday.

“The engagement of the IAEA is essential for resolving Iran’s nuclear issue.”

Iranian authorities announced on Wednesday that they would no longer cooperate with the agency. Japan had been urging Iran to continue to cooperate with the IAEA and said all necessary diplomatic efforts to achieve this will go on, in cooperation with the international community and relevant organizations.

“Japan has consistently emphasized the importance of resolving Iran’s nuclear issue through dialogue, based on the position that Iran’s development of nuclear weapons must never be allowed, for the sake of maintaining the international nuclear non-proliferation regime,” the Foreign Ministry added.