However.....some years ago when the Japanese were busy building oil refineries and the like in the middle east...there were so many Japanese that the TV stations had Japanese programs on.
It seems that a number of locals learned the Japanese language and got one way tickets to Narita airport....
On arrival the spoke excellent Japanese and were not put off by the police.
Once established they brought in friends and relatives.
So there is a fairly big "underground" Japanese speaking islamic population.
i just discovered that there is a muslim “presence” in Japan.
I had no idea
http://www.japanesemuslims.com/