Although Japanese level is not a necessary condition for the postgraduate entrance examination of communication engineering, if you are engaged in related industries in the future, having certain Japanese ability will definitely lay a good foundation for your career development. Therefore, it will be helpful to have a certain Japanese ability when taking the postgraduate entrance examination.
Because communication engineering is also a very important subject in the world, many multinational companies need to cooperate and communicate with Japanese companies. Having a certain level of Japanese can improve work efficiency and increase the convenience of communication with foreign businessmen.