Japan's deputy chief cabinet secretary has urged Iran to abide by the 2015 nuclear deal it signed with several world powers.
On Monday, Yasutoshi Nishimura expressed concern about Iran's announcement on Sunday that it will raise its level of uranium enrichment beyond the limit set by the agreement.
Nishimura said Japan is deeply hopeful that tensions will ease in the Middle East and that the region stabilizes.
He said Japan urges Iran to immediately return to its commitments under the deal and refrain from taking further steps that undermine it.
Nishimura said Japan's position is that resolution through dialogue should be sought to ease tensions in the Middle East and stabilize the situation.
He added that Japan plans to continue diplomatic efforts, and is conveying its stance to countries concerned, including the United States.