
"Census-kun"
Statistics Bureau: Concerning the 2005 Census
The 2005 Population Census will be conducted as of October 1, 2005, across the country. The respondents of the Population Census are all people living in Japan (about 128 million people, including foreign residents in Japan)
...Note: the results of the census will be used only for statistical purposes and never be used for any other purposes such as the immigration control, taxation or police files.
...it is obligatory to answer the questions of the census.