In fact, there are more and more high schools learning Japanese in Shanghai at present. Ganquan and Shangwai are the most famous. Besides, Yan 'an Middle School and Hongkou Senior Middle School also learn Japanese. Secondly, the classes started in high school are mainly interest classes, such as Shanghai Pudong High School. I suggest that you don't have to change your first foreign language into Japanese in high school, but English is the most useful in society, and then you can study it on weekends. Recommend Shanghai New Oriental Japanese training. This school has a brand and its students are mainly students.