@cicerone imposter,
Just to correct the record, we have both been wrong.
There WAS a Japanese-American convicted of treason against the US during WW2.
Her name was Iva Toguri D'Aquino, but she was more commonly known as "Tokyo Rose'.
She would broadcast anti American propoganda to American forces in the Pacific.
According to my grandfather, she knew units AND names of individual soldiers.
She broadcast that the USMC 2nd division was on route to the pacific, 1 day after they left port in Hawaii.
She had to be getting that information from somewhere.
I know she got it from Japanese intelligence, but where did they get it.
By inference, there had to be a Japanese spy ring in Hawaii and Ca.
BUT, she was the ONLY Japanese-American convicted of treason.
According to Wikipedia...
Identified by the press as Tokyo Rose after the war, she was detained for a year by the U.S. military before being released for lack of evidence. Upon return to the U.S., the Federal Bureau of Investigation began an investigation of her activities and she was subsequently charged by the United States Attorney's Office with eight counts of treason. Her 1949 trial resulted in a conviction on one count, making her the seventh American to be convicted on that charge. In 1974, investigative journalists found key witnesses had lied during testimony and other serious problems with the conduct of the trial. She was pardoned by U.S. President Gerald Ford in 1977.[1]