Tokyo
Japanese Prime Minister Shinzo Abe on Saturday discussed events in Iran and North Korea with US President Donald Trump in a lengthy phone call, the Kyodo news agency reported.
Rouhani's trip came after deadly protests over fuel price hikes in Iran, where the economy has been hit by US sanctions over Tehran's nuclear programme.
Japan is a key US ally that also maintains close diplomatic and economic ties with Iran, and Abe has tried to build bridges between the two rivals.
Abe did not refer to Iran when he met with reporters just before midnight Saturday, but a Japanese government source told Kyodo that Abe did talk to Trump about his discussions with Rouhani.
The Abe-Trump phone call lasted about 75 minutes, according to Kyodo.
Abe told reporters that he and the US leader talked about what Kyodo described as a "coordinated response" towards North Korea.
Pyongyang has shown frustration at the lack of sanctions relief after three summits with Trump.
Earlier this month it promised a "Christmas gift" if the US did not come up with concessions by the end of the year after it placed a moratorium on long-range missile tests.
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