Sri Sultan Hamengkubawono X (Hanacaraka: ꦯꦿꦶꦯꦸꦭ꧀ꦡꦟ꧀ꦲꦩꦼꦁꦑꦸꦨꦮꦟ꧇꧑꧐꧇, also spelled as Hamengkubawana X, often abbreviated as HB X; born Bendara Raden Mas Herjuno Darpito, 2 April 1946) is the Sultan of the historic Yogyakarta Sultanate in Indonesia and is currently also the Governor of the modern Yogyakarta Special Region (Daerah Istimewa Yogyakarta).