The MV Senopati Nusantara was an Indonesian ferry that sank in a storm on December 30, 2006. The Japanese-made ship was a scheduled passenger liner from the port of Kumai in Central Kalimantan (Borneo) to Tanjung Emas port in Semarang, Central Java. About 40 km (25 mi) off Mandalika Island, the ship sank during a violent storm in the Java Sea. At least 400–500 people are thought to have drowned.

Initial reports claimed as many as 800 were on board, although this was later lowered to around 628, including 57 crew. Design capacity was 1,300 passengers.