DaCostaBR: I said it's just a matter of principle, not if it's open for 5s or 10h. The hall is public property so your house should not extend itself to occupy it, especially if it can just as easily open inwards to your own private property.
Maybe it is about the difference in legislation or something. If I think about e.g. my apartment, the hallway to which the front door opens isn't really "public property" in the sense that everyone owns it. The whole apartment house, including the hallways naturally, are owned by the housing association (taloyhtiö), of which I also own a part because I¨ve bought one of the apartments. In our case the housing association (that is, me and all my neighbours who own their apartments) also owns the plot on which the apartment house is.
It may be this kind of "housing association" thing is quite a Finnish thing, at least I've heard that in many other (western) countries it is a completely alien concept. We have annual housing association meetings where we (home owners) decide together about expenses, incoming renovations to the house etc. We are in charge, we decide together what happens to the house, and in the house.
So what I meant to say is that the hallways are not public property in a sense that e.g. the state owns them, and anyone is allowed to come to the hallways just to spend time (if none of the residents doesn't approve it, or thei are not officials like policemen etc.). That's why we have the numeric lock in the apartment house entrance door, in order to keep drifters out. of the hallways, the storage areas etc.
That aside, I still didn't quite understand your Japanese kitchen window example. Do you mean that in Japan none of the apartment windows are allowed to open outwards because then they would be taking "public airspace" or something? That just sounds very odd to me. Or was there a neighbour apartment right next to your apartment so your kitchen window would open into their kitchen? I just have hard time imagining what the actual problem there was that you had to build a "block window" instead.
Sometime earlier I showed a photo of how the PC gaming room in my apartment looks like when I look out of the window (attached below). Who exactly would be inconvenienced if I'd open a window outward, the owls in the nearby forest? Or is it just about a principle, my windows should never open towards those trees outside because then I am taking their airspace?
As a sidenote, the ventilation windows at my home actually do open inwards, rather than outwards. But I presume this is not because we are not allowed to take any "public airspace", but simply because it would be much harder to open, close and wash the windows if they opened outwards. I don't want to drop to the ground from this high trying to wash the windows, or reach them in order to close them... :) Plus. the house looks neater from outside when the windows don't open outwards.
I guess this is a good thread to learn about these kinds of things, like I just can't now quite understand that "Japanese problem". I presume it is about the legislation there?
zeogold: Huh. I don't think I've actually ever seen anything like that before.
I've seen such in bathrooms, and some saunas. And yeah maybe it was an 80s thing mostly.
You can't open such windows though. If the kitchen window is not allowed to open outwards, why not put a window which opens inwards, or even slides to the side? In e.g. Thailand those kind of "sliding windows" seem to be quite common.