KGPAA Paku Alam IX (born as Ambarkusumo, 7 May 1938, in Yogyakarta) is the current ruler of Pakualaman, in central Java, Indonesia. He succeeded as Paku Alam upon the death of the last ruler, his father Paku Alam VIII, on 11 September 1998, and was formally installed as Kanjeng Gusti Pangeran Adipati Arya Paku Alam IX on 26 May 1999.