1. According to the latest list of Japanese universities accredited by the foreign-related supervision of the Ministry of Education, Niigata National University, public (county) universities and private universities do not have the name of this university, which is obviously not recognized by China's education authorities, and the diplomas obtained cannot be certified.

I haven't heard of this school, but there is a university called Nagaoka University. I wonder if your spelling led to the appearance of Yangtze University. Nagaoka University is recognized, and there are many international students from China. It was closed because of the earthquake.

-Non-experts