I read it as snark/sarcasm. Like they are adding something that already should be.

Always has.

Parenthood is already desirable. There's a biological drive and social conditioning to desire it for most people. The disincentives have just become overwhelming. Children take a hell of a lot of resources. Every aspect of modern society has drained all the time, money, energy, emotional resiliance, social support, etc that people need.

Housing is pretty affordable in Japan since housing in Japan is not an investment, it depreciates like a car (only the land has value, the house ontop of it has literally negative value since it's assumed anyone will want to bulldoze it), and their lax zoning allows for continual densification to happen.

Wait until you find out it is normal to tip your landlord there

https://www.interlinkjapan.com/blog/renting/key-money

Housing in Tokyo is known for being relatively affordable, actually.

There's a climate catastrophe caused by human overpopulation. How did you miss that?

The way I've heard it said is "if you live in a developed country, you could probably afford to move to Japan right now. If you get a job in Japan, you'll never afford to move back."

Japan's cost of living is low compared to developed nations, but their average income is also low for a developed nation.

rent is cheapish, it's everything else that will get you. if you're fine with crushing and all-permeating conformism, ridiculous degree of nationalism and misogyny, how you won't be ever accepted as one of their own as foreigner and famously toxic work culture, feel free to give it a shot