Japan will officially propose to Korea to jointly file a suit over the sovereignty of Korea's easternmost Dokdo islets with the International Court of Justice on Tuesday.
Japan's Kyodo News Agency reports that after holding a Cabinet meeting Tuesday, the Japanese government will deliver an official document to the Korean government through the Japanese embassy in Seoul.
The report adds that Japanese officials will also talk about ways to retaliate, if Korea doesn't respond to their proposal.
Some possible measures include reducing the 70-billion U.S. dollars worth currency swap with Korea, and scrapping plans to buy Korean bonds.
The Korean government, however, is unlikely to accept Tokyo's offer as Seoul says Korea clearly has and always has had territorial sovereignty and control over Dokdo.