My obaachan (grandmother in Japan) owned the neighborhood convenience store. I visited every other summer starting in 1969. In the evening I'd hear clickity-clack while she did the store's accounting on an abacus. A mechanical calculator made from wood.
Grandpa would build a wood fire in the ofuro-house, a tiny shed out back with a wooden tub heated by a wood stove, no electricity involved. That was the only hot water anywhere, other than a tiny heated thing next to the kitchen sink. This wasn't out in the bamboo sticks - we were in a major city, Sendai.
In 1973 on my third visit I was thrilled to discover they upgraded to a flush toilet. What a luxury! I had totally hated using their bathroom, it contained a pit toilet without a seat. Nobody in the area had enough land for an outhouse - this was all located inside a tiny house. When a truck stopped through to pump out all the sewage it was best to just leave that part of town. Some of the trains running before mid 1970s had bathrooms with pretty simple plumbing. Lift the lid and you're looking at the ground. This is why I have never been interested in walking on railroad tracks.