"I don t think they re ready yet but they ll be ready", Trump said.
Tokyo believes medical assistance for Iran would not breach USA sanctions against the Middle Eastern country given that humanitarian supplies are exempted from its sanctions list, they said.
Japan is considering offering medical aid to Iran when Prime Minister Shinzo Abe meets with Iranian President Hassan Rouhani on the sidelines of the United Nations General Assembly later this month, diplomatic sources said Sunday. "We are now way ahead of number two and three, which is Saudi Arabia and Russian Federation".
Earlier on Tuesday, the Iranian supreme leader said any direct negotiations with Washington were out of the question.
Iran has previously said it won't talk with USA officials unless Trump relaxes sanctions he implemented, after leaving the nuclear accord.
Ayatollah Ali Khamenei said the USA adopted a policy of "maximum pressure" on Iran because it believes it can not bring the Islamic republic to its knees through other means.
Iran responded by scaling back its commitments under the landmark accord, which gave it the promise of sanctions relief in return for curbs on its nuclear programme.
Tehran and Washington have been at loggerheads since May past year when Trump withdrew from a 2015 nuclear deal and began reimposing crippling sanctions.
"Let people do what they have to do, and they've done it", he said. Attacks on either location would significantly impede Iran's ability to process and sell oil, which the Trump administration has already been working to restrict after pulling out of the Iran nuclear deal. "That was a very large attack, and it could be met by an attack many, many times larger".