Space in Tokyo is really scarce. However, a lot of apartments have a small outside space or balcony - even if only because you need somewhere to stick the outdoor bit of the aircon unit which is standard here. On the majority of balconies you will see something I've only rarely seen in the UK - and which I've just found through googling described by an ebay seller as a "Plastic Fold Hanging Rack Peg Dryer Airer Wash Drying Hanger Indoor Outdoor Clip" which is quite a good name, or by Lakeland as a "Magic Hanger". These often hang from laundry poles for which there are standard fittings on most balconies. A la these in the flats I can see from our balcony.
ProbablyJane's Bracket Fungus pattern (rav link and fourth from right in above picture) which remains one of my favourite patterns. In fact looking at Ravelry those are now more than 6 years old - Go Lornas Laces Shepherd Sock Multi! Although they are reserved for bedsocks nowadays since they have gone quite baggy. These are not all of my knitted socks and the presence of the Fungus ones is not my only reason to think of ProbablyJane. In fact the reason why hanging them out like this made me happy is because I remembered her photos of hers hanging on her washing line back in London!