Fujita was with the US 131st Field Artillery,Texas NG,captured on Java in 1942.
According to Gavin Daws' Prisoners of the Japanese ,Fujita's heritage was not detected by the japanese until mid 1943:
Ironically Fukuoka 2 camp near Nagasaki was near where Fujita's father had been born.Fujita was offered Japanese officer rank,women and property if he changed sides for the propaganda value it would present.He declined.He was later forced to take Japanese language lessons as he indicated he couldn't speak the lingo.Transfered later to Tokyo he was forced to conduct some radio propaganda broadcasts but acting 'dumb" he wasn't much used.Later witnessed the fire bombing of Tokyo in 1945.Thereafter liberated and returned to Texas...and even stranger,not to be recognised as Japanese.After four changes of camp--two of them by ship--any number of shakedowns and sick calls,hundreds of days of morning and evening tenko and work details,he had still not been spotted..
...then at Fukuoka 2 in June 1943 a guard was showing off his English language skills,reading the names of the hut roster out loud,very pleased with himself,and in among the white names he read out Fujita,and suddenly registered what he had heard himself saying..