Students are allowed to have part-time job for maximum 28 hours a week after entering school. You need to apply for the work permit called "certificate to engage in activity other than permitted by the status of residence" previously granted by the Immigration bureau.
You can get this working permit directly at the airport, at the immigration counter while entering Japan if you apply for it there.
Foreign students are not allowed to work in adult shops, casinos, etc... and are also not allowed to overwork.
To find a part-time job, you can ask non-Japanese students who stayed long in Japan or schoolmates. Also magazines and Tokyo Employment Service Center for Foreigners (Hellowork) will help you to find a part-time job, if you want to get one.
|Type||Job Description||Hourly Wages|
|Soba Noodles Shop||Delivery||¥900|
|Take out Food Shop||Cashier/Delivery||¥900|