These experiences will not be free - you are advised to budget for more than the above figure if you wish to travel. The total cost of living in Okazaki is roughly half that of the Tokyo metropolitan area. Store prices in Okazaki are significantly lower than in Tokyo, restaurants and entertainment more affordable. Each of the local supermarkets have special days where prices are cheaper - particularly for fruit, vegetables and fresh food. A local street market sells low cost produce just 300 meters from the campus.
Bicycles are the easiest way to get around.
One of your biggest cost advantages is the fact that you will not need to pay for public transport to get to your classes. Figures from the Japanese Language Education Information Center indicate that international students in Tokyo and Osaka pay between JPY123,500 to JPY168,800 in public transport to and from their classes alone if they study for 1 year. If you work part-time then you should be able to recover your living expenses. This would depend on your level of Japanese and how many hours you were prepared to work. Remember that the longer you work, the less time you have available for study.