'Firm and solid action in response' to any provocation from hard-to-predict North

Korea, China, Japan to meet in Jeju

Korea, China, Japan: top diplomats reaffirm commitment

North Korea's obsession with nuclear weapons development will only hasten the country's self-destruction

N. Korea test-fires submarine-launched missile: Seoul

S. Korea, China, Japan vow to lead global efforts against N.K. provocations

Korea works on port development, marine hygiene with UN, Ecuador

Korea, Uzbekistan join hands on e-gov't, public administration