It's one thing to implement and andon cord, but it's quite another to get workers to actually use it.
1 The plants were antiquated 1970's US GE equipment https://en.wikipedia.org/wiki/Fukushima_Daiichi_Nuclear_Powe...
2 Japanese business culture is very deferential and top down. The amount of lying and covers ups around the Fukushima disaster was and is horrifying. Having worked for Sony I can say that there is an awful lot of dead wood in Japanese class system culture just as there is in the English class system, and that is not a healthy way to run something potential deadly on a global scale. I'm on the fence about nuclear power largely because of the above. It's not the technology, it's human and bureaucratic fallibility and greed that is the weak link
You're just cherrypicking positive stereotypes while ignoring negative stereotypes relevant to the matter, such as the trait of not making waves with your superiors and papering over problems to avoid embarrassment. These themes are explored in Shin Godzilla, which was a huge commercial success in Japan, undoubtedly because the Japanese public recognized some truth in how the movie depicted government incompetence in Japan.