Demographics of Turkey are available for the Kurdish population, because the Turkish government has outlawed ethnic or racial censuses. An estimate by the CIA World Factbook places their proportion of the population at approximately 18%. Another estimate, according to Ibrahim Sirkeci, an ethnic Turk, in his book "The Environment of Insecurity in Turkey and the Emigration of Turkish Kurds to Germany", based on the 1990 Turkish Census and 1993 Turkish Demographic Health Survey, is 17.8%. Other estimates include 15.7% of the population according to the newspaper "Milliyet", and 23% by Kurdologist David McDowall. The Minority Rights Group report of 1985 (by Martin Short
Ethnic groups of Japan of Justice. In 2006, Japanese/Filipino marriages were the most frequent of all international marriages in Japan. As of March 12, 2011, the Filipino population of Japan was 305,972. Koreans in Japan are the fifth largest ethnic minorities in the country. Most of them arrived in the early 20th century. As of 2012, there are 530,421 Koreans in Japan who are not Japanese citizens. Chinese people in Japan are the one of the largest ethnic minority in Japan. They comprise 0.52% of Japan's population. Chinese people are mostly concentrated in Osaka, Tokyo, and Yokohama areas. The Ainu is an aboriginal ethnic