This intelligence-sharing agreement isn't something new for either country.

In 2012, Japan and South Korea were ready to sign off on the agreement, but Seoul declined to do so at the last minute due to domestic objection. Opponents of the pact claimed that Japan hadn't sincerely apologized for its wartime atrocities on the Korean Peninsula before and during World War Two.

In 2014, the two countries signed a similar pact to share military information on the DPRK through the United States. But Pyongyang's repeated recent provocations have provided strong momentum for both sides to resume bilateral talks in November after a 4-year hiatus.

The agreement will be sent to both countries' cabinets for approval.