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.
We kind of have that, but it isn't by floor since its a one-story building, but we are an American small tech company. The engineering department (department I am in) is separated by a long glass wall. In side of there, we are expected to keep it quiet. Now, we are not discouraged from conversation, say I need to tap another engineer's shoulders and discuss some architecture. But it expected to keep it relatively quiet and not distracting. Other side of the glass wall, its a free for all.
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.