If the subordinates have to lie about taking time off, and intentionally accept lower pay for the benefit of their superiors - then no, it's definitely not reciprocated. I'd argue the subordinates are straight up being abused in this case.
Japan clearly has its own problems, but honour and duty play a significant part in their culture and, admirably, contributes to the creation of a high-trust society.
For one, I don't want a long life. I want to live as long as I'm not a burden. Don't want to burn down in my final years all that I will have built up for my kids and their kids.
Now, they say that anime is not real life in Japan, and it's true; however it absolutely reflects (I dare say: indoctrinates viewers with) cultural elements of Japan. And this "fuck up your kids' lives so you can take care of your parents" is so characteristic. A good example (of this terrible phenomenon) is in Lovely Complex, where Nobu-chan effectively needs to abandon her sweetheart Nakao-kun, just so she can care for her grandmother, who's about to move to Hokkaido. The most heart-wrenching part is where Nakao and Nobu's grandma sit at the dining table, and Nakao is guilt-tripped into actively encouraging Nobu's grandma to travel to Hokkaido and to rob him of his beloved Nobu. Fuck all that, seriously.
My parents are immigrants from Southeast Asia and the culture is similar, but it's children taking care of their parents (in all facets, including financially). People ask me why I'm not rich despite making a Silicon Valley salary without living in Silicon Valley... Well, I pay two rents (mine and my parents'). Yes, I know they can move in with me to save money, yes I could just say no and leave them in the lurch, yes I could do xyz, but this is the reality.
I do have the sense of duty towards them, because they took care of me and my siblings, and we wanted for nothing, despite not being an affluent family. But the tradition stops with me. I personally would never make my kids take care of me like that, and I would rather be euthanized early than have my family's last memories of me being bedridden, changing my bed pan, etc. And I'm taking all measures necessary to ensure that I leave my family a financial legacy (life insurance, retirement accounts, brokerage accounts, etc).
I'm just someone who is different and western civilization applauds individualism to some extent (except highly religious communities, army, etc).
For people like me such societies are pretty cruel.
In the Netherlands children are a selfless act they are not a pension fund for their parents.
Another version of this is, what happens if the younger generation doesn't take the deal -- do they get fired? Keeping them on is a form of reciprocation, even if bleak.
Likewise, is there an implicit deal where when the young get old, they get to work less? If so, it is eventually reciprocated.
I do think it is not reciprocated instantaneously.
It should be unidirectional giving. Give to your children, and save for yourself. Retire to an assisted living facility, don't become a burden. Hope to die as soon as you become a burden. If you decide to die, because you are done living, I firmly believe that you can die.
Complicating things is the fact that for the fist 10+ years, children are extreme burden, so the "transgenerational exploitation" is actually done by the younger generation, even if they didn't mean it. That's the cost of bringing them into existence. It's not fair for parents to keep their children forever in their debt, but let's not pretend we don't owe anything to our parents and their generation either.
It's selfish to demand your children be personally responsible for you.
Making young people miserable under the crushing weight of caring for themselves and their irresponsible elders won't inspire them to produce and share grandkids.
You are right that there should be no crushing weight inflicted. Not all of Japanese worklife has the exploitative nature described upthread. And indeed, seems to be decreasing significantly from the 1980s. For instance, the following situation is no longer likely:
"A boss is working late, so the employees under the boss keep working without being requested to. If the boss disagrees with their decision to stay, then instead of directly telling them they may leave (because they may feel obligated politely refuse as long as the boss is still working), the boss will 'go home' by walking around the block. This gives the employees time to leave, before the boss returns to continue working late."
Consider that in Japan, doing what is best for a group of which you are part is more important than self-interest. There is some modern trend to a little more individualism, in part as reaction to some past and current excesses, and somewhat due to influences of foreign cultures. In general, it seems to be trending toward balance while still keeping a lot of importance of your in-group.