"The meeting will be taking place very timely against the backdrop of North Korea's provocation of launching a new type of ballistic missile and the assassination of Kim Jong-nam," ministry spokesman Cho June-hyuck said in a briefing. 

"The upcoming consultation will deal with the three countries' trilateral action plans over the possibility of North Korea's various provocations and handle in detail, ways to bring the North to the path toward sincere denuclearization through faithful implementation of United Nations Security Council resolutions and the three countries' separate sanctions," the spokesman noted.

The meeting will involve South Korea's special representative for Korean Peninsula peace and security affairs Kim Hong-kyun and his American and Japanese counterparts, Joseph Yun and Kenji Kanasugi, respectively.

During his trip to Washington, Kim will also hold separate bilateral meetings with Yun and Kanasugi, and meet with other US officials, congressmen and academics, the official said.

The trilateral meeting came after Foreign Minister Yun Byung-se and US Secretary of State Rex Tillerson set the tone for their cooperation against North Korea under the new US administration during their talks in Bonn, Germany, last week.

They reaffirmed their determination to secure the complete, verifiable and irreversible dismantling of North Korea's nuclear weapons program and vowed to work together toward the goal.

On Feb. 12, North Korea test-fired an intermediate-range ballistic missile using solid fuel and a mobile launcher, demonstrating progress in the country's nuclear weapons delivery capability.

Last week, the half brother of North Korean leader Kim Jung-un was assassinated with poison in Malaysia. Several North Koreans, including a diplomat, were named as suspects. (Yonhap)