Japan: Cultural Homogeneity

Japan is a good example of a nation state. It's cultural homogeneity is overwhelming [jppeo].

The following is from the 1997 CIA World Factbook:
[http://www.odci.gov/cia/publications/factbook/index.html]

Ethnic groups: Japanese 99.4%, other 0.6% (mostly Korean)[jppeo]

Religions: observe both Shinto and Buddhist 84%, other 16% (including Christian 0.7%)

Languages: Japanese