What happened
During the initial climb phase following departure from Osaka-Itami Airport, the crew of a seaplane experienced significant mechanical difficulties involving the engines. As the aircraft struggled with these engine problems, it lost sufficient airspeed and entered a stall condition.
The aircraft subsequently descended into a nearby rice paddy field. The impact resulted in two fatalities among the occupants. In addition to the deaths, eight individuals sustained injuries during the accident.
Findings
Official investigations concluded that the primary factor leading to the loss of control and subsequent crash was engine problems occurring immediately after takeoff.