U.S. Trade Representative Robert Lighthizer on Tuesday called for prioritizing a deal with Japan on agricultural tariff cuts as part of efforts to strike a bilateral trade agreement.

"What I have proposed doing is to try to take care of a couple of the issues, particularly agriculture, early. ... We don't want to wait the length of time for an entire negotiation," Lighthizer said at a congressional hearing.

"Beyond that, we want to negotiate across the board with the Japanese," he said.