Muslim population in Japan is approximately 100,000.
There are no official statistic data of Muslim population in Japan. Professor Tanada at Waseda university researched Muslim population in Japan as of 2011. He estimated that approximately 100,000 Muslim people live in Japan. Here is the breakdown of Muslim population in Japan, 2011.
Table 1: Muslim population in Japan, 2011
|Muslim people in foreign citizens||91,744|
|Muslim in illegal aliens||2,632|
Table 2 : Population of Muslim people staying in Japan by the country of origin
Source is "Muslim Population in the World and Japan, 2011", Hirofumi Tanada, 2013