North Korea test-fired two missiles into the sea early on Wednesday, a news report said, prompting condemnation from Tokyo.
It was the latest of several such launches this week, as South Korean, Japanese and US leaders condemned Pyongyang’s nuclear weapons programme at a meeting in the Netherlands.
“North Korea fired a ballistic missile at 2:35 am (1735 GMT) and another at 2:45 am” into the waters east of the Korean Peninsula, the South Korean military was cited as saying by Yonhap News Agency.
Japan lodged a protest with North Korea over the latest launch, Foreign Minister Fumio Kishida said.
At a summit in the Hague Tuesday, South Korean President Park Geun Hye and Japanese Prime Minister Shinzo Abe joined with US President Barack Obama to declare Pyongyang’s nuclear weeapons programme a major threat to security in Asia and the world.
Park and Abe had not met before, even though each has been in office more than a year, amid tensions over a territorial spat and Japanese communication over the Second World War.
Japan and South Korea are both formal allies of the United States.