Yapahu was a mayor/ruler of the city/city-state of Gazru (modern Gezer) of the 1350-1335 BC Amarna letters correspondence.
Two other mayors of Gazru during the Amarna letters period, were Adda-danu and Milkilu.
Yapahu is the author of five Amarna letters to the pharaoh of Egypt, EA 297-300, and EA 378, (EA for 'el Amarna').
Adda-danu, another mayor of Gazru, had the same topic of a: Pot of a Debt.
See letter: EA 292: Adda-danu, (title: Like a Pot held in Pledge).