My one Japanese company experience was in my early career, and it was discouraging. It has been so long, I can name NEC.
The colleagues were great, but on the occasions that executives from Japan were visiting, we were specifically told to look busy. And looking busy actually meant printing things out, walking around with papers, etc. Even in those dark, pre-eco times, I found it absurd. On the plus side, I got proper introduction to sushi and fell in love with that.
I can only imagine what a good situation one must have to spend 27 years there.
Cheers to your future endeavors.