There is significant potential for the Japanese companies to participate in a variety of oil and gas projects in Iran, said Zanganeh after a meeting with the Japanese foreign minister.
The international community, including Japan, has high expectations of Iran as a responsible, big country, the Japanese top diplomat said in an interview with Iran daily.
Ayatollah Hashemi Rafsanjani has said that Tehran and Riyadh can improve their ties and that disintegration of certain Middle Eastern countries is not a regional demand.
Tehran has called on the UN and influential countries in the Yemeni crisis to ramp up efforts to bring an immediate end to the Saudi-led air strikes on Yemen.
Iran's UN ambassador has said that Israel continues to block all international and regional efforts to create a nuclear weapons-free zone in the Middle East.
The Japanese and German economic teams in Tehran have said that they can help Iran revamp its automotive industry and develop its agriculture and food industries.
Attacks on residential areas, schools, and hospitals are in flagrant violation of humanitarian laws and rules, deputy foreign minister Amir-Abdollahian said.
The Russians ultimately want the US should have wanted from the bombing campaign in Syria and that is to destroy IS, said the Iranian foreign minister.
A senior Sunni cleric in Lebanon has called on Islamic countries to form a committee and launch an investigation into the exact cause of the Mina tragedy.
Deputy Foreign Minister Hossein Amir-Abdollahian said Iran and Russia have always supported the people and government of Syria in the face of terrorism.
The vice-president for legal affairs has said that Iran is not empty-handed to sue the Saudi government for failure to honor the international responsibility envisaged by the International Law Commission in 2001.
Two painful incidents took place in Mecca this year which left a lot of pilgrims from several Islamic countries dead and hurt sentiments of Muslims, Rafsanjani said.