In fact, compared with the requirements of some domestic enterprises, you will not pay attention to your Japanese level when you enter a Japanese enterprise, as long as you know your Japanese level as soon as you open your mouth. So you can concentrate on practicing listening and speaking now. Listening You can dictate programs on some websites, such as Japanese House and Hujiang Japanese. Choose a program and listen to it every day. After a while, you will find that your listening has made great progress. For oral English, first of all, you can make use of the resources around you, such as Japanese foreign teachers and Japanese students. In addition, you can make friends with Japanese people through the Internet, such as skye, where you can make voice or telephone calls (VoIP is free).

I hope my answer is helpful to you.