A lot of this company pressure begins even before people enter companies.
I'm a student in one of Japan's most well-regarded universities (and I'm not saying this to show off, but it's true. The school's produced 6 Prime Ministers and has alumni from the CEOs of Samsung and Sony; even Yamauchi was a student before dropping out). I'm not on an exchange program, but enrolled as a realtime graduate student.
Even graduate school is a bit of an oddity in Japan. Japanese college graduates are expected to go to work and become (for lack of a better word) slaves to the companies. The ones (Japanese) who do decide to go gain extra skill, but most also happen to be proficient in English, so many have an already have an international outlook and may want to head overseas in the near future. Japanese schools also attract other East and Southeast Asian students who believe in this system, so it's usually Westerners who object.
Before finishing university, students are expected to do systematic job hunting, which shows the differences in what purpose a university is supposed to serve in Japan and Western countries. In Japan, you go to school not to gain knowledge, but to get a permanent, secure job. In Western countries, employment is also seen as an incentive to go to college, but knowledge and resume building is another purpose. Japanese students feel their degrees are everything they need, regardless of what their major was or what they actually studied. Japanese companies will train all hired workers anyway. Graduate school serves an even more differing purpose in Japan and elsewhere: in Japan, it lands you a job. Elsewhere, it would explicitly give you more knowledge.
What does this mean for the game industry? Well, I just mentioned this post because I can see the seeds mentioned in this thread sowing right before my very eyes, every single day, among my peers. Whether one would agree or not, Japanese society is fairly rigid. The dismantling of the core philosophies of a company like Nintendo will not happen easily.