The Pontianak incident consisted of two massacres which took place in Kalimantan during the Japanese occupation of the Dutch East Indies.
In the 1943-1944 Pontianak incident, the Japanese orchestrated a mass arrest of Chinese, Malay elites, Javanese, Menadonese, Dayaks, Bugis, Bataks, and Minangkabau in Kalimantan, including all of the Malay Sultans, accused them of plotting to overthrow Japanese rule, and then massacred them.
[1][2] The Japanese falsely claimed that all of those ethnic groups, and organisations such as the Islamic Pemuda Muhammadijah, were involved in a plot to overthrow the Japanese and create a "People's Republic of West Borneo" (Negara Rakyat Borneo Barat).
[4] Up to 25 aristocrats, relatives of the Sultan of Pontianak, and many other prominent individuals were named as participants in the plot by the Japanese and then executed at Mandor.
[16] According to Jamie S. Davidson, this rebellion, during which many Dayaks and Japanese were killed, occurred from April through August 1945, and was called the "Majang Desa War".