1. i totally relate when you say that the longer you stay in japan, the less comfortable you feel about moving back to germany. i kind of feel that way about moving back to the united states thinking that things will be much harder there than they are here.

2. do you teach english now? if you're japanese is so high level, why not do something else?

3. i think it's interesting that you're worried about foreigners in germany...when you're a foreigner in japan...

4. why do you think you couldn't get a job you liked in germany? do you like your job in japan, or is it just comfortable?

5. i personally feel like if you do stay in japan longer, it'll be impossible/extremely hard to go back to germany cuz you'll be old, finding a job will be harder at that point, and you wouldn't have contributed to all the things that the government helps you with when you get older (in the US that would be social security, medicare, 401k money saving things...I don't know how Germany operates).