Prime Minister Shinzo Abe and his Russian counterpart, Mikhail Fradkov, agreed Wednesday to negotiations on a nuclear cooperation pact and inked accords to boost bilateral economic ties, a Japanese government official said.

The two leaders did not discuss details of the possible nuclear pact during the meeting. Trade minister Akira Amari has said Japan might outsource uranium enrichment to Russia for power plants in Japan.

Fradkov arrived Tuesday in Tokyo with a delegation of about 200 government officials and business leaders.