Applying for working holiday visa Japan?

So I have an internship starting on 1st June in Japan and I am still waiting for my CoE which was applied for last year in Nov.

As the internship gets closer I am afraid I won't get the CoE on time so I am thinking about applying for a working holiday visa to make it in time.

But the application requires an itinerary what I want to do in Japan. I am not sure if I should mention my internship as it's a visa with the main focus on traveling. But after my 6-months internship I would stay another 6 months for actual working holiday. I will apply in Germany.

by Ok_Connection_7308