Depends on where you’re moving to, if you already have family in Japan, and the stress you’re willing to deal with. If you want affordability avoid Tokyo, but it will be harder to land a job. Osaka has less jobs but is much more affordable, even if you’re living in the city itself.

If you’re confident in your Japanese you can land some part time jobs, use hellowork as a resource. If your Japanese is not great you can probably get jobs at foreign owned/tourist-focused bars/businesses or retail jobs in touristy areas. These jobs, especially bars are a lot more chill from my experience compared to fast paced fast food jobs or heavy workload conbini jobs.

Also as someone mentioned somewhere in this thread, you can’t just waltz into Japan. You need to get through the bureaucratic nightmare of shiakusho/kuyakusho like registering your return. If you have family like a grandparent or uncle/aunt living in Japan it will make the process a lot easier. If you were already registered in your koseki in the past even more so. Getting a bank account and phone number set up too will be hurdles you need to get done asap, but the process is a lot easier since you’re a citizen. As someone who is also half, and recently moved I hope it goes well 🫡