The history of Islam in Japan is relatively brief in relation to the religion's longstanding presence in other nearby countries.
Today however, Muslims in Japan are well established, numbering somewhere between 100,000 to 300,000 - with approximately 10% being native. Additionally, there are about 100 established Mosques and Musallahs. Outside of Japan, Muslim countries heavily trade with the country, with bilateral trade standing at some $300 billion dollars; larger even than Japan's trade with the United States.
Islam in Japan has over 3 centuries worth of history, with the earliest Muslim settlers believed to have worked in the cities of Yokohama and Kobe during the reign of the Meiji.
To Work In Japan, a foreigner must receive a job offer from a guarantor in Japan, and then apply for a working visa at an embassy or consulate outside the country.
Working visas are valid for a period of 3 months to 5 years, and may be used to secure employment at any employer within the scope of activities designated on the visa "including employers other than the guarantor".
April marks the start of the year for schools and many companies in Japan — a month when many newcomers from overseas arrive in the country, just in time for the cherry blossom season.
If you are one of these new arrivals, a lot will be fresh and unfamiliar, and that, unfortunately, applies to the problems you may face as well as the positive aspects of your new life here. Even long-term residents are not immune to complications related to their visa status, work, money, family and so on.