General– category –

"If only I had access to drinkable water on the spot during a disaster..." Many people have had this thought. Nowadays, it's easy to find emergency water purifiers for around 3,000 to 5,000 yen on sites like Amazon. Some of them claim th...

"Running out of bottled water reserves..." — In such a moment of crisis, these *household water purification techniques* could be your last resort.You don’t need an expensive purifier — with a little creativity, you can make drinkable wa...

In recent years, large-scale disasters caused by earthquakes and extreme weather events have occurred frequently. Among them, disasters in major urban areas are said to be particularly devastating due to their scale and far-reaching impa...

"Water for 10 Billion Lives" — From Village Wells to Global Waterworks Hello, my name is Shunsaku Matsuo.Let me share my 25-year journey with water — in a slightly narrative form. With children on the path to a water source in Mushikiri ...

It is often said that "tap water in Japan is safe to drink," but recently, concerns such as "tap water is dangerous," "you should use a water purifier," and "bottled mineral water is more reliable" have been spreading anxiety. But is tha...

Recently, the term "small-scale decentralized water systems" has been gaining more attention. Especially after the 2024 Noto Peninsula Earthquake, this keyword has been increasingly used in discussions about creating more disaster-resili...

― 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...