If the Japanese want people to work 80 hour weeks (and go drinking with their boss every night) maybe they should make polyamorous marriage a thing. Kids are a lot easier to deal with if you have help.
From what i heard from people and read online, i really don't understand how people even do that. Japanese work etiquette is bananas. But that aside, my job is somewhat high demand, but i draw the line at work hours. I work 42 hours a week and not a second longer. That opens up enough times for some hobbies, enough free time and everything. But if i had kids, most of that would be gone. So if you're a work horse, you're expected to give up everything, except work and raising kids.