Articles

In times of disaster, such as earthquakes or water outages, ensuring that available water is safe to drink requires proper chlorine disinfection. But how much of the household sodium hypochlorite solution should be added to make it safe?...

We often take water for granted. But when an earthquake or flood disrupts the water supply, we suddenly realize just how vital it is. Do you know how much water people typically use each day? Globally, the average daily water usage per p...

– A Comprehensive Overview from Drilling Risks to Cost – 15% of Japan’s tap water comes from groundwater (Japan Water Works Association, 2024).Some cities, such as Kumamoto and Akishima, rely 100% on groundwater for their tap water. Howe...

― A Quick Overview of Tap Water Production in Japan ― We take it for granted that water flows when we turn on the tap. But the journey begins at the “water source,” passes through the “water treatment plant,” and finally reaches our home...

― Why Tap Water Isn’t Always Safe to Drink ― Only 12 countries in the world have safe tap water to drink (WHO, 2023). Japan is one of the rare cases. Yet bottled water and water purifiers continues to sell. Why?This article explores...

I started my own business in February 2025. Things are still a bit hectic, but I finally have a little time to blog (or rather, I feel it's about time I did), so I'm starting today. My goal is to write one post per day. Some posts may be...