In a meeting with Prime Minister's Special Advisor Katsuyuki Kawai, Nobakht underlined that his organization will do its best to step up investments.
The two countries' officials have exchanged suitable visits in the past two years, he said.
Nobakht further noted that Finance Minister Ali Tayyebnia expressed satisfaction over agreements made during his stay in Japan last month.
Letter of credit worth $10 billion opened during the minister's visit can serve as a way for bolstering bilateral ties, he said.
The Japanese official and accompanying delegation also met Governor General of Central Bank Valiollah Seif.
Seif proposed holding a session between the Iranian and Japanese banks to get acquainted with the banks.