Student visas are not for Japan for the Japanese language studies required 90 days (3 months) for nationals of the following countries:
Singapore, Canada, USA, Argentina, Bahamas, Chile, Colombia, Costa Rica, Dominican Republic, El Salvador, Guatemala, Honduras, Suriname, Uruguay, Barbados, Belgium, Croatia, Cyprus, Denmark, Finland, France, Greece, Iceland, Italy, Luxembourg, Macedonia, Malta, Netherlands, Norway, Portugal, San Marino, Slovenia, Spain, Sweden, Andorra, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Monaco, Poland, Australia, New Zealand, Israel, Turkey, Lesotho, Mauritius, Tunisia
Visas for Japan study are not for the Japanese language study is required 180 days (6 months) for nationals of the following countries:
Austria, Germany, Ireland, Liechtenstein, Switzerland, Britain, Mexico.
However, a student visa, known as the University pre visas, only for studies of 180 days (6 months) or longer issued. Obviously that leaves a gray area of the 90 days visa-students who have more than 3 months, but they want to study less than 6 months.
If you have more than 90 days for a maximum of 180 days of study and nationality of a country that has a 90-day exemption from visa requirements are the following options are available.
First Request a tourist visa in the long run for more than 90 days but less than 181.
Second Citizens of Australia, New Zealand, Canada, Korea, France, Germany, the UK, Ireland and Denmark, which has 30 years of age or younger are able to apply for a Working Holiday Visa for one year.