Hiro H4H

H4H
General information
TypePatrol flying boat
National originJapan
ManufacturerHiro Naval Arsenal
Primary userIJN Air Service
Number built47
History
Introduction date1933
First flight1931

The Hiro H4H (or Hiro Navy Type 91 Flying Boat) was a 1930s Japanese bomber or reconnaissance monoplane flying boat designed and built by the Hiro Naval Arsenal for the Imperial Japanese Navy.