My wife and I are both expats living in Tokyo for 10+ years. We decided to move back home in the next 7-10 years for various reasons, closer to family with our young family being the main one.
My question is would you go thru the mountains of paperwork to buy a property here with a mortgage and live in it until you leave then sell it at a (more than likely)loss? We would be buying the real estate only not the land underneath it.
The flip side is, if we stay for 10 more years paying rent, renewal fees

I know this a vague question with no numbers to really crunch, but we would be looking at buying a place for around ¥45-¥55million, or continue paying rent at our current rate of ¥180,000 per month.
Thanks in advance.