SEOUL, South Korea—North Korea on Thursday test-fired its first short-range ballistic missiles since President Joe Biden took office, as it expands its military capabilities and increases pressure on Washington while nuclear negotiations remain stalled. Japanese Prime Minister Yoshihide Suga said the launches threaten “peace and safety in Japan and the region,” and that Tokyo will closely coordinate with Washington and Seoul on the North’s testing activities. South Korean Foreign Minister Chung Eui-yong, after meeting his Russian counterpart in Seoul, expressed “deep concern” over the launches and urged the North to uphold its commitments for peace. Russian Foreign Minister Sergey Lavrov called for a swift resumption of dialogue to resolve the standoff with North Korea. South Korea’s Joint Chiefs of Staff said the two short-range missiles were fired at 7:06 a.m. and 7:25 a.m. from an area on the North’s eastern coast and flew 450 kilometers (279 miles) on an apogee …