Go to the website, or directly call the enrollment phone number of the school over there, ask the phone number of their personnel department, and say to go for an interview. If you need a Japanese teacher, I will contact you. Generally, such training institutions are constantly recruiting part-time teachers. After all, part-time teachers are too mobile. Generally speaking, the class fee is 60- 100, which should not be very high at once, but it is not necessarily the case. It depends on what you learn in the interview and what kind of courses you teach.