During the Japanese occupation, both Allied and Japanese bombings destroyed many of the buildings in the village. Many residents fled Song due to the war. The town became chaotic during the war and its people endured harsh Japanese administration. During this time, the Chinese started to build the first primary school in Song. After the war, the British colonial government gave Sarawak dollars to residents of Song to rebuild their homes. In 1948, the fort at Nanga Song was moved to Nanga Katibas (mouth of Katibas river). Thus, the administrative centre at Song river was effectively moved to Katibas river. The Chinese also restarted their businesses in Song after the war.