The Seoul visit comes as the United States and South Korea, along with Japan, have condemned what they say is the supply of arms and military equipment by North Korea to Russia.
North Korea is preparing to launch a spy satellite after having failed twice this year to put one in orbit.
South Korea's spy agency said last week North Korea was in the final stages of preparations for the launch after apparently receiving technical assistance from Russia.
U.S. Secretary of Defense Lloyd Austin is also due to visit South Korea this week on a trip that will include Indonesia and India.
In Washington, U.S. and South Korean officials held talks on North Korea's illicit cyber activities that they say fund its unlawful weapons programs, South Korea's foreign ministry said.
Persons:
Antony Blinken, Yoko Kamikawa, Toshifumi, military's Vandenberg, Defense Lloyd Austin, Austin, Soo, Choi, Ed Davies, Michael Perry
Organizations:
Japanese, REUTERS Acquire, Rights, South Korean, SpaceX, U.S, Defense, Blinken, United, Thomson
Locations:
Tokyo, Japan, Rights SEOUL, Seoul, Russia, Blinken's, Asia, India, Israel, United States, South Korea, North Korea, Washington, North, Ukraine, Pyongyang, Korea, Moscow, Russia's, South, Indonesia, North Korean, Pacific, Washington , U.S, United Nations