[3] Nicknamed "Sunny Boy" by camp residents, Sone developed a reputation for being a rampant Europhobe and violent drunk who made life hell for internees[4][5] and subordinates who defied him.

[7] Similarly, Sone kept an aviary on camp grounds, where myna birds were fed freshly cooked rice, fruit, and vegetables as internees looked on.

[8] Sone was said to have displayed symptoms of manic depression and was considered "moonstruck" as many of his most brutal acts of violence took place during a full moon,[9] culminating on the night of 21–22 June 1945, when tens of women and girls were beaten and had their heads shaven.

[4][8] On 23 June, lieutenant Sado Sakai took over command of Tjideng and Sone was transferred to Bandung, where he would be arrested by the Allies following the end of World War II in Asia.

[1] The sentence was carried out by a firing squad in Glodok Prison on 7 December of the same year, after a request for clemency to the acting governor-general of the Dutch East Indies, Hubertus van Mook, was rejected.