But for a non-Japanese national i.e. not having paid into their healthcare system, wouldn't it be shockingly expensive to take out permanent private healthcare insurance.
I say this because here in France (I'm a UK citizen) I'm covered for 70% of healthcare costs only because I paid into the UK system for many years, plus there is a reciprocal agreement between the 2 governments. For the remaining 30% coverage I take out private insurance. Anyone coming here from outside the European Union without healthcare coverage wouldn't get 'free' cover in France.
This healthcare issue (or the lack of it) is so often overlooked by those looking for 'the perfect place to live'.
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Maybe, maybe not. Learning a new language is very much age dependent. For a young child, they'd master the basics within 2-3 years, including the new alphabet! For those 30 years or over it could easily take 10 years or even more. For those in their 50's they'd probably learn enough to get by, but imho would never become fluent.