Senior diplomats from Japan, the United States and South Korea will meet in Tokyo this weekend to discuss responses to North Korea's fourth nuclear test, Foreign Minister Fumio Kishida said Tuesday.

"The idea is to confirm close trilateral cooperation in dealing with North Korea," Kishida told reporters.

Japan is expected to be represented at Saturday's meeting by Vice Foreign Minister Akitaka Saiki, the United States by Deputy Secretary of State Antony Blinken and South Korea by Lim Sung-nam, first vice minister for foreign affairs.

Ahead of the meeting, the countries' chief delegates to the six-party talks to denuclearize the Korean Peninsula, which have been deadlocked since late 2008, are slated to meet on Wednesday in Seoul. The other parties are China and Russia.

Kishida also welcomed the U.S. military's dispatch Sunday of a nuclear-capable B-52 bomber on a flight over South Korea in an apparent show of force at North Korea.

"(The dispatch) reflects the United States' strong commitment to fulfill its role toward peace and stability of the region," he said.