The first governor was the late Hamengkubuwono IX, Sultan of Yogyakarta, and continued by Paku Alam VIII as acting governor until Hamengkubuwono X ascended in 1998.
The first governor was Hamengkubuwono IX, the Sultan of Yogyakarta, who served until Paku Alam VIII took over as acting governor.  Hamengkubuwono X then succeeded him in 1998.