SamuraiBlue wasn't talking about filial piety - I think he is talking about
senpai & kohai relationship. In Japan, the "elder" or senior person (senpai) will assume the position of responsibility to take care the people of junior position (kohai) - in return the junior offers respect to the senpai. The relationship is not merely within the family or extended family - it extends far beyond that - in work place, or in school - even extends to complete strangers. This is most apparent in South Korea where an elder can scald a and even command a person (who is a complete stranger) junior in age to them.
I think this level of Confucianism integration has its advantage and disadvantages - the advantage is society that adopts this level of Confucianism is more socially cohesive, people care more about one and another and society is more unified. Example being Japanese CEOs who resisted mass layoffs because they felt responsible for the lives of those under his command and made the whole company suffered for it - this happened a lot during the early 90s when Japanese economy bubbled and burst. Most of the western CEOs wouldn't think twice for this kind of things and mass layoff happens regularly and the western CEOs are rewarded for it.
On the downside, because the senpai are often being the respected - their action are often not questioned because to question their action is a sign of disrespect. This often leads to bad decision making as the smarter but younger "kohai" are afraid to speak their mind.