The Hiro H1H (or Navy Type 15) was a 1920s Japanese bomber or reconnaissance biplane flying boat developed from the Felixstowe F.5 by the Hiro Naval Arsenal for the Imperial Japanese Navy. The aircraft were built by Hiro the Yokosuka Naval Arsenal and Aichi.
Made by Hiro Naval Arsenal.
It is the successor of the Felixstowe F.5 .