He seized the throne after his father Bayin Htwe was taken captive by the Confederation of Shan States in 1532 back to Upper Burma.
Bayin Htwe escaped after the Confederation's leader Sawlon was assassinated by his ministers, and returned to Prome (Pyay), c. May 1533.
[3] When Toungoo troops attacked a heavily fortified Prome, Narapati asked for help from the Confederation in Ava.
The Confederation troops broke the siege, but refused to follow up on the retreating Toungoo armies.
The following is his ancestry as reported in the Hmannan Yazawin chronicle, which in turn referenced contemporary inscriptions.