I worked for a Japanese corporation where each floor had different rules.

One floor had an open-plan layout where people were open to chitchat, another open-plan floor that expected everyone to be quiet, and there was a floor with reservable cubicles or sound-proofed rooms. In general though, I do agree that the culture is on the quieter side.

I really enjoyed working there because the level of isolation was entirely up to you, depending on your mood.