The first two places I lived in when I came to Japan, so total of three years in particularly shitty conditions even compared to the generally low standard of housing here.
The first had an ancient boiler that was actually dangerous. Built just post-War and basically never maintained. It was an old fashioned type that sucked water from the tub, circulated it through the boiler, and back into the tub. There was no showerhead. I had to boil the whole tub to get enough hot water to bathe, which I did by pouring buckets of water over me.
I spent a few months doing that before I finally had enough and asked someone to come out and at least give me an estimate on what it would take to get hot running water. At the inspection, and the guy said basically, “This needs to be fixed or replaced before it goes ‘boom.’” The danger was why I was eventually able to convince my employer (effectively also my landlord) to find the funds to get actual hot running water in the bathroom. Eventually. It promptly froze solid for two weeks that winter, until we got a thaw.
It’s typical in Japanese homes to have local water heaters, no central one. That house had no hot running water at first except for the kitchen, where I had a half-decent heater. The updated one in the bathroom that provided a warm trickle when the water was particularly cold starting out. Water heaters are virtually always on-demand types. The “stove” was a one-burner gas hot plate. Again, ovens and actual stove tops are rare to unheard of in Japan, but usually you have at least two burners. There was enough of a counter to have a cutting board on one side of the sink, but nowhere to put any other dishes while preparing things. I ended up having to put stuff on the floor in the hall so I didn’t step on it while getting things ready. Cooking was not easy there.
The walls were ridiculously thin. If I turned the heater off, about ten minutes later it was almost as cold in that room as outside. There is usually no central heating in Japan. If I hadn’t bought a sleeping bag rated for −15ºC on my first trip back to the US, I would have frozen that winter. Didn’t help that the winter was one of the coldest on record in the area, but there was no way to heat the place and keep it warm. I would literally have had better protection from the cold if I’d slept in a tent.
The windows didn’t fit right, so during the rainy season, I ended up having mold growing on my tatami. The floor was thin and probably worn over the years. I ended up nearly putting my foot through the floor in a couple of places. The stairs were (again typical for Japan) extremely steep. I rushed too much going to answer the phone once, slid, and basically didn’t touch the ground again solidly until I hit the bottom.
Those were the the highlights.
The second place had some of the same problems, along with 20 years of neglect, disuse, and drifted dust that I had to clean out when I moved in. The tub was even smaller than the first house. I used it twice, and decided it wasn’t a good idea to get into a tub that was so tight that I had to keep my arms outside so that I could lever myself out again.
That area was hotter than my first place, and again, as is typical in Japan, there was basically no insulation. It was always hotter inside than out of the house, and it was in the high 30sºC Every. Single. Day. From mid-June to the end of September. Oh, and the screens were busted until I could fix them, so I got eaten by mosquitoes for a couple of weeks until I finally got enough time off to both: go shopping, and actually do the work.
People who haven’t lived in Japan think it’s all high-tech and shiny. It’s not. Even expensive high-rise apartments in Tokyo are filled with fake plastic wood, crappy sheet metal or particleboard kitchen furnishings, and literal holes in the wall for air conditioning ducts due to some horrible construction regulations. Houses like the ones I lived in were slight exaggerations of what’s typical for many. I’ve never, ever visited anyone here who had a house or apartment that made me think, “Wow, I’d love to live here! This is a really nice place!” and I’ve been in a couple of places that were expensive even by Japanese standards, which means they probably would market for the equivalent of a few to several million dollars.