Japan Muslim Population 2024. A study by tanada and his colleagues showed there were 113 mosques across japan in march 2021, up from only 15 in 1999. Islam, one of the world’s major religions, has seen significant growth in japan over recent decades.

In 2009, the population was 128.56 million and is expected to be 126.48 million by. Islam is an abrahamic, monotheistic religion that began in the 7th century a.d.,.