Found this info on the link below
[i]A joint group with members from the US Navy, US Army Air Forces, Royal Australian Air Force (RAAF), and Royal Navy was formed in Australia in 1942. Later, some US Navy personnel of the group were withdrawn to the United States where they formed a Technical Air Intelligence Unit (TAIU) at NAS Anacostia, near Washington, DC. The Anacostia TAIU was supported by other Navy air stations such as those at North Island, San Diego, California, and Patuxent River, Maryland.
In early 1943 the TAIU in Australia rebuilt a Mitsubishi A6M "Zeke", using parts of five different aircraft captured at Buna, New Guinea. The completed aircraft was test flown ; the flights included mock combat against a Spitfire V. It was concluded that the "Zeke" was superior to the Spitfire below 20,000 feet. In late 1943 the "Zeke" was shipped to the United States aboard the escort carrier USS "Copahee"; it went to Wright Field where it was flown and evaluated.
Other Japanese aircraft acquired by the TAIU in Australia included two "Oscars " and a Kawasaki Ki-61"Tony". The "Oscars" were test flown in Australia in March and April 1944; the "Tony" was shipped to NAS Anacostia later in 1944.[/i]
OK, so as I read it, the Tony ended up back in the US, so what happened to the rest???if you follow this link the information suggests more aircraft were evaluated by Australian and US authorities.
www.airforcehistory.hq.af.mil/PopTopics ... hintel.htm
happy reading
Digger