In this dream, Japanese devils represent aggressive forces, and you beat them, representing resistance and conflict.
This dream means that there are some external pressures in your life, which are often exerted on your thoughts, with a strong and aggressive image, and brutally attack your thoughts. You expressed resistance.
Because you always have such dreams, it shows that this kind of pressure often exists, which may come from people and things around you, that is, people and things close to your life. Like classmates, colleagues or family relationships.
Generally speaking, it represents a kind of pressure and conflict, and also shows resistance.
Dreams are signals from the unconscious and the collective unconscious, so it shows that you have suppressed the anxiety and anxiety under this pressure. So, the solution is that you solve it at the level of consciousness. This requires you to face up to this kind of pressure and anxiety, analyze it and deal with it.
Don't let it be suppressed to the unconscious level, and you won't have such a dream.