From personal observation this is very true, Japan has a great and unpretentious grey collar culture. There's a way in which all work is seen as equally essential and managers aren't above anyone else. Not just at Toyota, but even waiters in restaurants are treated like this, I think it shows in how negatively tipping is seen in Japan.

It's also a culture that exists here in Germany in Mittelstand companies, although sadly less and less in large firms where management culture from the Anglosphere seems to have gained popularity over the last 20-30 years. American management always reminds me of the historical British army, where the gentry directly was recruited into the higher ranks American management and workers seem equally stratified.