In the evening of 26 December 1941, Sibu people started to ransack an unguarded government rice storeroom. Some villagers staying along the Rajang River also came to steal for daily necessities. The situation soon got out of control. British Sime Darby company, Borneo Company Limited, and Chinese businessmen became the victims of the riots. The Chinese businessman decided to form a security alliance to calm down the chaos. On 29 January 1942, a Japanese advance team was invited from Kuching to restore order in Sibu, who then later fled from Sibu back to Kuching. The power vacuum continued to exist in the third division until 23 June 1942, when the Japanese headquarters in Kuching sent Senda Nijiro to become the new Resident of the Third Division of Sarawak. After he took office, he immediately declared that Imperial Japanese Army would take total control of people's lives and property. On 8 August 1942, Sibu was renamed to "Sibu-shu".