You don't have teaching experience. Have you got any diploma's ? What kind of teacher do you want to be? Isn't it better to try out teaching before you go to Japan? what if it turns out that you dont like it ? I mean DJ-ing is in interesting occupation, but it does not provide a lot of financial security at the start. So he will be relying on you at the start I think. What kind of things do they mention when they decline your application? I also want you to have a clear picture of this forum, for as far as this is possible.
I dont think any of us have a job as Job consultant. Better yet, I dont think most of us have a job at all yet. So if you want job-related advise I urge you to check with for example your government. Can't they provide you with information? Aren't their organisations that can help you plan this thing?
Sorry if I sound offensive/rude, I dont mean to be.
