Every student learns Japanese for a different reason. Regardless of your reason, say to study in Japan, sit Japanese language exams, or just for leisure, there is a Japanese teacher that suits you. When you look for a teacher, you can refer to his/her background and experience. Say some teachers specialize in Japanese examinations, some like teaching about the Japanese lifestyle. Also, some langauge centres provide entrance exams for non-beginners to find courses that match their level.