How do Japanese reuse domestic water?

In Tokyo, gyms in many apartments or bathrooms in libraries are very small, with an area of 1.5 square meters. The width of the bathroom is not much wider than the door. I found that the sink inside was very pocket-sized, and I thought: How can I wash my hands in such a small sink? I tried to put my hand under the faucet of the sink and didn't dare to wash my hands in a big way. Naturally, the water can't be turned up, or it will splash out. It suddenly dawned on me that this small sink can make people clean their hands after going to the toilet without wasting water, because if the water is turned on, it will splash on their clothes, so people naturally have to use small water to finish the cleaning work carefully.

Japan is a rainy country, especially in the rainy season. It rains almost every once in a while, sometimes for several days. This is a country with abundant rainfall. Not only does the state pay for laying sewers on streets and roadsides, but it can also collect and treat them, and then turn them into usable reclaimed water, and the national awareness of water conservation is also reflected everywhere. When I was walking in the streets of Tokyo, I saw residents put big pots and small pots under the eaves when it rained, and stored rainwater for watering flowers on sunny days.

Japanese love cleanliness, as if they have been washing. However, they also have a special way. For example, after eating, they will first wipe the cookware and tableware with paper towels, and then wash the residual juice and oil stains in the cookware and tableware with water. They think that this not only saves water, but also prevents the oil from cooking utensils from flowing into the sewer (oil flows into the sewer more seriously than feces flows into the sewer).

In Japan, there are centralized sewage purification treatment plants in densely populated areas of large and medium-sized cities, and large companies and factories also have their own independent sewage purification treatment facilities to make full use of water resources. There are many single-family houses in Japan, especially in small cities and villages, with a family of three and five people. Therefore, Japan developed a high-performance combined purification tank more than 0/0 years ago. This kind of purification pool has a sewage treatment capacity of 5 to 7 people, so it is called "small combined purification pool". Generally installed underground behind the home, close to the kitchen and bathroom. Sewage from residential buildings must pass through this purification pool before it can flow into public sewers, otherwise it is illegal.

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