What conditions should I have if I want to work in Japan or a Japanese company?

First of all, you need to have a Japanese level certificate, generally at least level 2. Many big companies need level one, and then you have to pass oral English. Dumb Japanese who can only take exams will not accept it. Third, they must rely on their own abilities. If you want to learn Japanese, I recommend Hangzhou Modern Japanese Specialized School. In the face of adult Japanese training, Hangzhou Modern Japanese is the best, and it has long been a cooperative unit with many Japanese companies and Japanese companies in China. Japanese companies often send employees to schools for training, and schools often recommend some preferential students directly to Japanese companies for employment. Now there are many Japanese companies in Xiasha, such as Yazaki, Toshiba and Panasonic, and many of their employees are modern students.