Japan has urged dozens of Japanese nationals including aid workers in South Sudan's capital of Juba to leave the country and dispatched military aircraft to evacuate them amid renewed fighting in the African nation.

Japan sent C-130 transport aircraft to Djibouti on Africa's eastern coast, though it's unclear how they will travel the 3,000 kilometers (1,900 miles) between Juba and Djibouti.

Chief Cabinet Secretary Yoshihide Suga said Tuesday that the government was doing its utmost to protect the Japanese. He said Japanese defense troops building roads and infrastructure will stay.

The Japan International Cooperation Agency, a government-funded organization, said its more than 40 staffers were safe and standing by at home to be evacuated. JICA contractors were killed in a militant attack in Bangladesh this month.