From that, people who have a job in Japan often feel obligated as in "You gave my a job and made it possible to live my life. You invested N years in training me. I'm now responsible for various parts of your business. If I leave it will feel like not paying you back for all you've given me. It will also put you out for weeks to months.".
Japanese have an acute sense of obligation as well. There's a reason why you say "Don't worry this is really nothing" when you give a gift in Japan as you're trying to avoid adding to the receiver's obligation to reciprocate.
Of course as a westerner that attitude used to bug the crap out of me. I knew a person who wanted to quit, their boss said "no, you can't quit", and they stayed on for several more months. At some point in my life my attitude would have probably been something along the lines of "If it's that important I stick around what's it worth to you?"
The longer I'm in Japan the more I'm mellowing on some of my western and spoiled engineer attitudes. Of course not totally but I feel like the it's "me vs them" attitude I see so much on HN leads to worse outcomes than the "we're all in this together" attitude or the "it takes a village" attitude I see more of in Japan. I think both extremes are bad but if my meter was pointing at the 100% me side before it's now around the 75% me side, 25% us side, now.