For trilateral discussions on North Korea, Seoul's top nuclear envoy travels to Japan.

To participate in trilateral discussions with his US and Japanese counterparts on North Korea's nuclear development, South Korea's senior nuclear envoy left for Japan on Tuesday.

On Wednesday in Tokyo, Kim Gunn, the special envoy for peace and security on the Korean Peninsula for Seoul, will meet with Sung Kim, the special envoy for North Korea for Washington, and Takehiro Funakoshi, the director general for Asian and Oceania....