Foreigners wishing to enter Japan are required to apply at an overseas Japanese diplomatic establishment (embassy or consulate) for a visa that must be stamped in or attached to their passport, valid for travel to Japan. If they fail to obtain the appropriate type of visa, they might be denied entry into the country. Therefore it is necessary to start the procedure to obtain an appropriate type of visa for your purpose of stay. The Certificate of Eligibility for Status of Residence which is issued by the Japanese Immigration Bureau is required for the visa application. It is advised to start this procedure 2 months prior to your expected arrival date to Japan. If you begin any later, you might not be able to obtain your visa in time, and it will be difficult for you to come to Japan as planned.
To enter Japan you need a passport and a visa (unless you are from a country which is visa-exempt). There are a number of different types of Japanese visas that are designed by the Japanese government for different purposes and lengths of time.
There are 68 countries whose citizens can enter visa-free for tourism or business. Other nationalities currently need to go to a Japanese embassy or consulate to apply for a visa. Japan plans to introduce an eVisa in 2020 that will simplify the application process to acquire the Japan visa.