Since we started English Online Consultation Service, we have been frequently asked about tourist visa. If you are interested in coming to Japan as a tourist, please check the website of Japan Embassy in your country. They should provide detailed information about the application process.
The important point about Tourist Visa is that whether you need it or not is dependent on the country you are from. If you are a national of countries whose nationals Japan requires to apply for a tourist visa before they come to Japan, you have to prepare several documents (other than visa Application Form) such as Bank Certificate, Daily Schedule in Japan, etc.