(21 March 1914 – 8 June 1992) was an officer of the Imperial Japanese Army during World War II. He served in both China and in the Pacific campaign. After Japanese forces were defeated in the Battle of Saipan, he led a group of soldiers and civilians deep into the jungle to evade capture by Allied forces. Under Ōba's leadership, the group survived for over a year after the battle and finally surrendered in December 1945, three months after the war had ended. Following his return to Japan, he became a successful businessman and served on the city council of Gamagori, Aichi.