Visas will be your challenge. Unless you’re married to a Japanese person, it will be hard for you to get a work visa without being employed by a Japanese company. Any way to try to get around that is gonna be a lot of work (and a bit of money too).
However, if you wanted to take a 1 year sabbatical, you could get a job as an engineer with a Japanese company, work for a year, apply for fast track permanent residency at the end of that year (you’ll need to meet some education/income requirements), then go back to your old job remotely. There are software jobs that hire people who don’t speak Japanese.
However, if you wanted to take a 1 year sabbatical, you could get a job as an engineer with a Japanese company, work for a year, apply for fast track permanent residency at the end of that year (you’ll need to meet some education/income requirements), then go back to your old job remotely. There are software jobs that hire people who don’t speak Japanese.