Michelle Bachmann did make that allegation, however it was in fact accurate.
See for instance this article that appeared in the New York Times in 2000: http://www.seattlepi.com/national/cens17.shtml
Then in 2007, new documents released by the government showed that the census was involved more than had been previously admitted: http://www.usatoday.com/news/nation/2007-03-30-census-role_N.htm ... quote: The Census Bureau turned over confidential information including names and addresses to help the Justice Department, Secret Service and other agencies identify Japanese-Americans during World War II, according to government documents released today.
Seeing as both of these were found in the first page of a Bing search for "japan census used for internment" and within the first 3 pages of the same search on Google, I would suggest your "research" method is somewhat faulty.
You are deliberately ignoring the timeline I discovered and specific locales.