First off, the politeness is only ONE part of the culture in Japan. Politeness would have had little to do with why "JIT" would be accepted quicker and work better there than here. The parts of the culture, like strict obedience when ordered, does not sit all that well here. We question more. It is the order and a much stricter adherence to the idea of living up to the responsibilities and expectations of your position that makes it work better.
In a very loose way one could describe Japan as a "beehive" or "ant colony". Everyone has a function and a place. Everyone is expected to do the job assigned, failure is not an option. That is one of the reasons their kids do better in school, they are expected to do well, parents, and the society in general, demand it, and the parents are expected to make sure that they do. There is little of the "feel good" stuff we have here. The work is demanding, and rather than lower standards to make it easier for the less gifted they expect the less gifted to work harder to make up for the lack of gifts. There are no trophies for just showing up.
No, I did NOT imply a desire to live under a culture like they have in Japan, I said that most American's, I suspect you, would not want too. You would like the "politeness" part but I have no doubt you would NEVER accept many of the traditions that they have or that their culture demands.
We, in the US, need to look a ways to develop systems that work within our culture. We need more "leaders" as opposed to "bosses" both in the work place and in politics. We do better when ideas pass from one level to the next, in both directions.
We DO however, need to start demanding that our kids do better in school. The "FLUFF" has to go. No participation trophies. There has to be intense competition, at all levels, the the best have to be allowed to excel. There has to be clear winners and losers. We once had that, we threw it out, the results show.