The thing is, you're basically in a safety zone. Even though you seem to have had enough of it, your job is safe. Living in Japan, while a pain in the a-- sometimes, is also safe. I don't mean to offend you, but you are also safe in your lack of a romantic relationship - you don't have the potential risk of heartbreak. This entire situation doesn't really challenge you and as such is limiting your personal growth and fulfillment.
All that being said, you really ought to start taking some risks. Nothing ventured, nothing gained!
The job - yes, you renewed your contract but you can get out of that. People do it all the time. Don't worry about the inconvenience to them, as you have to do what's best for you. You may not be able to find a job that is your dream or passion - welcome to the real world. Just find a job that you wouldn't mind doing that can support you and keep up with your other interests on the side.
Living in Japan - Just get out. You don't have to go back to Germany but try something else. From your experience in Japan, it may seem that you need to have a job in hand before moving somewhere. Even in this day and age when you can do skype interviews etc. that's not always the case. You may need to be in country to do job hunting, live off your savings for a while, and sort out the visa situation later. As far as which particular country to move to, well that's all just a matter of preference. You might need to take a trip to some of these places first to experience them and get a real sense of whether you could live there or not.
Relationship - You seem to put yourself down a lot in this category. I don't know why. You are an attractive woman. However, if your low self-esteem manifests itself IRL, I can see how you'd have difficulty finding someone to be with. Low self-esteem is a real turn-off. Granted, as a foreign woman in Japan finding someone is especially challenging. While there are foreign women who have found someone and settled down in Japan, that's a very small percentage. So the odds are against you. By the way, have you been attracted to anyone that you've met while living in Japan? If so, what did you do about it?
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All that being said, you really ought to start taking some risks. Nothing ventured, nothing gained!
The job - yes, you renewed your contract but you can get out of that. People do it all the time. Don't worry about the inconvenience to them, as you have to do what's best for you. You may not be able to find a job that is your dream or passion - welcome to the real world. Just find a job that you wouldn't mind doing that can support you and keep up with your other interests on the side.
Living in Japan - Just get out. You don't have to go back to Germany but try something else. From your experience in Japan, it may seem that you need to have a job in hand before moving somewhere. Even in this day and age when you can do skype interviews etc. that's not always the case. You may need to be in country to do job hunting, live off your savings for a while, and sort out the visa situation later. As far as which particular country to move to, well that's all just a matter of preference. You might need to take a trip to some of these places first to experience them and get a real sense of whether you could live there or not.
Relationship - You seem to put yourself down a lot in this category. I don't know why. You are an attractive woman. However, if your low self-esteem manifests itself IRL, I can see how you'd have difficulty finding someone to be with. Low self-esteem is a real turn-off. Granted, as a foreign woman in Japan finding someone is especially challenging. While there are foreign women who have found someone and settled down in Japan, that's a very small percentage. So the odds are against you. By the way, have you been attracted to anyone that you've met while living in Japan? If so, what did you do about it?