I wonder if some of the people commenting here have ever been to a city like Tokyo. It is a great example of what is actually possible when it comes to cleanliness and safety in a massive urban environment.
I think their point was that safe cities are possible, not that we should all move to Japan. Someone who has only experienced a dangerous city or a car centric city, the possibilities might not be obvious to them so there is a very defeatist attitude, as if this is just the way cities are.
I remember cruising through the streets of Tokyo in the middle of the night, still worried that I might get jumped by a meth hear even though it was extremely unlikely. It's a pre-conception that is hard to let go of.
If Pewdiepie, a man worth millions of dollars can do it after four years of Byzantine bureaucracy can do it, anyone can! Seriously though, he documented just how difficult the process is on his YouTube channel. Moving to Japan is insanely difficult.
Assuming you get a job, it's actually not difficult. If you work in tech, you can probably even get a visa that gets you PR in 3 years. I moved mostly on a whim directly prior to the pandemic, and haven't run into any major stumbling blocks.
The language barrier is the biggest issue. Assuming you live in a large city (and really, you should), the town halls have translators. You may need to wait for them to be available, and the translations may not be amazing, but they'll help you solve any tasks you need to do.
The next biggest issues are getting a phone number (you need a residence card first), getting a bank account (you need a residence card and a phone number), and getting a credit card (you need a residence card, a phone number, and will need to deal with them sending your card with your katakana name on the envelope). If you have a job, they'll help you do all of these things.
Getting housing isn't really a problem. At this point there's lots of gaikokujin housing (short-term rentals, month-to-month leases, sharedhouses, etc). It's possible to find it online with no Japanese language skills. Again, if you have a job, they'll help you find housing.
If you're coming in as a student, your school will also help you with all of these things.
Pewdiepie makes money off of making content. Saying "hey, this isn't very hard" isn't entertaining. Don't use him as a real-life example.
I think it's a lot easier for employees than for freelance types. Even the companies hiring language instructors will do most of the paperwork for you.
There are many developed European cities that are totally fine and do not have major cultural barriers. Some of them even speak english as a first language!
