Japanese officials say talks with China and South Korea on a free trade pact will need more time before a deal can be reached.
Negotiators wrapped up a three-day meeting in Seoul on Friday. It was the 16th round of talks since they started in 2013.
The Japanese officials say the countries remain apart over rules of trade, but that strained relations between Tokyo and Seoul have not affected the talks.
The two countries have been at odds in recent months over Japan's exports controls and a wartime labor issue.
The Japanese officials also expressed a willingness to strike a three-way deal that goes beyond the Regional Comprehensive Economic Partnership. RCEP participants, including the three countries, aim to sign an agreement next year.
The next round of three-way talks is set to take place in China.