Re: All in all, it's not really comparable to a Western business 'integrity' maneuver.
Isn't that because it's not a "maneuver" at all? Whether it's cultural or to do with integrity they don't feel they can accept the bonus. Your talk about law is pretty disingenuous, it's perfectly legal to not pay a bonus which could just as easily happen in the west.
"It's a pretty small price for the Sony execs to pay though" So why don't we ever see this sort of thing over here then?