The chief military officers of South Korea, the United States and Japan agreed Thursday to boost their intelligence sharing on North Korea's recent long-range missile test and react "resolutely" to it, the Joint Chiefs of Staff said.

JCS Chairman Gen. Lee Sun-jin held talks with his U.S. and Japanese counterparts -- Gen. Joseph Dunford and Adm. Katsutoshi Kawano -- to coordinate their joint response to North Korea's recent provocations.

On Sunday, North Korea launched a long-range rocket carrying a satellite in what the outside world denounced as a test of intercontinental ballistic missile technology.

The launch came on the heels of the communist country's surprise nuclear test on Jan. 6.

The three chairmen condemned the nuclear and missile tests as a "head-on" violation of United Nations' resolutions and vowed to "react resolutely" through close intelligence sharing, the JCS said of the result of the three-nation talks.

The meeting was held in Hawaii, but Lee participated from Seoul via video because he had to oversee combat readiness at home.

The military chiefs also agreed to boost their collaboration on other mutual security issues regarding the Korean Peninsula and the Northeast Asian region, according to the JCS.

It is the first gathering of the three military chiefs since the last one held in July 2014.

North Korea claims its rocket launch was to put an Earth observation satellite into orbit, but the outside world viewed it as a disguise for testing its ballistic missile technology.

The communist North is banned under U.N. Security Council resolutions from conducting launches using that technology. (Yonhap)