I am kind of similar right now, in that I was planning to leave next year, and now I've decided that I'll stay longer (if not forever).

I think that most people covered what I wanted to say about cutting back on travel. I just want to add that you should follow your heart. If you feel that something is missing, it probably is. Maybe it's finding your calling, or maybe finding a boyfriend. Remember, your boyfriend doesn't have to be Japanese. In fact, I bet if you found a nice foreign guy that lives in Japan, you might get along really well. You might change your mind about leaving or staying, based on your relationship and feelings. :) (Who knows!) As for finding him, well, it would be hard in the countryside, but there are plenty of foreigners and Probably even Germans living in Osaka. :) Try checking out Facebook groups and any foreign language magazines. :)

As for a career/calling, I think that you have some good skills. Teaching, writing, photography, organization, which can all be applied to finding a career. Imagine if you had a job that dealt with Japan and Germany, that required you to travel a lot between them! Maybe even required you to have houses in both countries! You can create that job, if you really want to. :)