South Korean Defense Minister Su-wook spoke by telephone Thursday morning with his American and Japanese counterparts, Lloyd Austin and Nobu Kishi.
Seo, Austin and Kishi agreed in the phone call to work closely together to counter North Korea 's evolving missile threat, the Seoul Defense Ministry said.
According to Yonhap News Agency, the talks between the defense ministers of South Korea, the United States and Japan took place after a series of North Korean missile tests, including the launch of a medium-range ballistic missile on January 30.
The ministry said in a statement:
The three ministers agreed that the three countries would work closely together in the face of North Korea's missile threat and continue efforts to achieve the goal of denuclearizing the Korean Peninsula.
The South Korean Defense Ministry explained that the three also agreed to meet in person on a date "agreed upon by the parties."
According to Yonhap, Sue called North Korea's recent series of missile tests a "direct and serious threat" to South Korea and a "challenge to UN Security Council resolutions."
According to a UN Security Council resolution, North Korea is prohibited from launching any ballistic missile technology.
South Korea's defense minister also said:
Seoul intends to strengthen both its independent defense capabilities and those of the US-South Korean alliance to counter Pyongyang's nuclear and missile threats.