South Korea's President Moon Jae-in and US President Donald Trump have agreed to exert stronger pressure through sanctions on North Korea following its nuclear and missile tests.
South Korea's presidential office says the two leaders spoke on the phone on Sunday
"The two leaders agreed to strengthen co-operation, and exert stronger and practical sanctions on North Korea so that it realises provocative actions leads to further diplomatic isolation and economic pressure," Blue House spokesman Park Soo-hyun said in a televised briefing.
The Blue House said Moon and Trump had strongly condemned the latest missile launch by North Korea, and agreed that the two nations would work with the international community to implement the latest UN Security Council's resolution 2375, Park said.
The two leaders' phone call came after North Korea fired an unidentified missile early on Friday from the Sunan district in its capital, Pyongyang, over Japan.
The missile flew about 3700 kilometres, reaching a maximum altitude of 770 kilometres, according to South Korea's Joint Chiefs of Staff.
German Foreign Minister Sigmar Gabriel said international response to North Korea requires "a combination of a clear stance and sanctions, as well as diplomatic options".
Gabriel is visiting Beijing on a visit for the opening of an exhibition of German artists and to hold talks with Chinese officials that are likely to focus on the North Korea crisis.
Germany's top diplomat said a solution could not be found without co-operation between the United States, Russia and China, and that there had to be clear consequences to Pyongyang's actions as a warning to other countries seeking nuclear capabilities.