 After the end of the war, Daigo was arrested by SCAP authorities at the request of the Netherlands government, and was extradited to Batavia in the Dutch East Indies, where he was charged with war crimes in connection with the kidnapping, torture and massacre of 21,000 people (including women and children) by Japanese troops in Pontianak during the Pontianak incidents.After being held for several months under severe conditions, he was found guilty in a closed military tribunal at Pontianak after only three hours of testimony, during which time he was not allowed to speak in his own defense, and was executed with a rifle shot to the stomach on 6 December 1947.As Daigo was commander of submarine forces, (although from 8 November 1943 the 22nd Special Guard Division based at Balikpapan, Borneo fell nominally under his command), his connection (if any) with the events in Pontianak from 23 April 1943 – 28 June 1944 remain very unclear.