Financial supporter salary for visa

Greetings,I am preparing for Students Visa application and as needed I had to submit information of my financial supporter. My parents will cover all of my expenses but I need to put information of my relative in visa application documents as my financial supporter for some reasons, he earns 1,600$ a month but is it enough to meet the criteria for immigration bureau? Could u tell me least how much a financial supporter be earning to be acceptable for these official documents preparations? Thank u in advance.

By "my relative", do you mean a relative living in Japan and who will be your sponsor/guarantor? If your financial support will come from somewhere else, such as your parents back home, that person's income should not really matter. Of course, you will need to show evidence that your parents can support you as you claim.