I’ve lived and worked in Japan for the last decade. This is pretty much what every office I’ve ever worked in looks like, with the addition of a desktop book stand as a demarcation line in my current office. Half the shelf is mine, half is for the use of the person across from me. If I need actual privacy for something, I have to go somewhere else with my computer. This is part of why most Japanese businessmen have portable computers. It’s rare for the office to have computers for everyone, even now. A HUGE amount of work that has been computerized in most Western countries is still done on paper here.
For privacy at my current place, there’s a section storage room with a couple of desks, a single window, and no internet access. This kind of thing was also was typical of past jobs. You use a conference room or other space if you need quiet, but there is no data or in many cases phone connection, and the gods will rain fire on your head if you’re unavailable if something related to you comes up and you’re not in the communal office and not officially scheduled elsewhere.
Most offices I’ve worked in have wired internet only, and it’s slow. Everyone can see everything you’re doing anyway, so you don’t have an expectation of privacy (which is practically a foreign concept in Japan anyway) but you would be well advised to keep your access mostly business-related. They’re a bit more lenient than US companies in some ways, probably since no one ever EVER goes home on time, so they let some of the personal stuff and work stuff overlap. You end up taking time off to go to the bank, for example, because otherwise you’d never be able to actually go to the bank when office hours there are 10:00–3:00, (no Saturdays and Sundays) and you’re getting off “early” at 8:00 PM. Depending on how strict your office is, this could be required to be taken out of your vacation/leave/sick days, or just marked as officially excused time out of the office.
There’s a brief morning meeting for either the whole office or the whole section in most companies that everyone must attend. That’s held in the communal office, after which people disperse to their section offices if those exist.
I got used to all this stuff after a while, but it really sucked at first. Japanese are socially and culturally trained to do stuff together, so for them being tucked away in a private office would be some kind of punishment. Something to note if you ever host a Japanese manager or liaison: they’ll probably feel as if they’re being excluded if you give them their own private space. The few people who do have private offices tend to be management, but they spend most of their time at their secondary desk in the communal room; the private office is usually for keeping confidential information and for meetings with other important people.
At this point, I’d probably have to re-acculturate to semi-privacy at work. A cubicle farm would be more depressing than a more open layout. It might be kind of cool to have my own office though.