system
A chat on subreddit /r/wallstreetbets
human
I looked into this last year. Requirements then were 3-5 years minimum plus must have a job or open a business and provide into the local economy. Not so bad but seems like a lot of legwork
gpt
Also likely be socially isolated, as many local Japanese especially in the rural areas don't really socialize with foreigners. There are even places in Tokyo that ban non-Japanese speakers.