In 1932 the IJNAF purchased one Savoia-Marchetti S.62 from Italy to test it as a long range flying boat. In 1936 following completion of the Navy evaluation and testing, the flying boat was disposed to Nihon Koku Yuso Kenkyujo (Japan Aviation Transport Institute) receiving the civilian registration J-BBWI. It was remodelled and scheduled to participate in 1937, in the 15-year celebrations since the founding of the Kenkyujo by flying from Osaka to Thailand but the plan did not materialise. It was used in sea rescue and fish spotting.
Below a rather rare photo from a vintage, April 1937, publication with the flying boat in front of the Kenkyujo hangar.