To apply for authorization of resident eligibility, unless you are High-school-educated Chinese, Mongolian, Myanmarese, Bangladeshi, Vietnamese, Sri Lankan, Nepalese, you might have disadvantages unless you have not passed any one of the tests below. J.TEST,NAT-TEST,TOP-J-TEST or GNK-TEST, Besides, you may not be able to find a part time job if your Japanese level is under JLPT N5 when you come to Japan. So please study hard with the goal of N5 before application, and aim N4 before you come to Japan.