Pilot of the airframe was Captain Shiro Sakauchi of the 68th Flight Squadron in New Guinea.
He survived the battle there to fly a Ki-84 later but was regrettably killed during air combat with some P-51s above Tokyo on June 10, 1945.
EJP Base 2446 was Hollandia Dutch New Guinea there were 3 AirStrips there Cyclops , Sentani and Hollandia ,US Force's invaded the area April 22nd 1944 backed up by the US Navy Task Force 58, the first 5th Air Force aircraft to come in was the 8th FS' P-40N's from Gusap New Guinea on May 7th .
The D4Y4 was planned to be equipped with 5 Type 4 rockets under the fuselage for acceleration intended to shake off US fighters but was not used in actual mission because some aerodynamic issues were not solved.