June 2025– date –
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Preparing for a Massive Water Outage in the Capital— A Practical Look at Tokyo’s Water Supply and the Threat of a Direct Earthquake Beneath the Capital —Series Preview
A major earthquake directly beneath the capital could strike at any time. "You turn the tap, and no water comes out."That day could be tomorrow. If it's a capital-region quake, the Tokyo Metropolitan Area is at risk. If it's a Nankai Tro... -
Is Tap Water in Japan Safe to Drink? A Look into Its Exceptional Quality
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... -
Rethinking Small-Scale Decentralized Water Systems
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... -
[Disaster Preparedness] How Much Chlorine Is Needed to Disinfect Water During Emergencies?
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?... -
[Essential Guide] How to Secure Water During a Disaster: Smart Tips to Survive on 20 Liters per Person per Day
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... -
Using Groundwater as Tap Water
– 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... -
Japan’s Water Source and Treatment System
― 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... -
An Overview of Water Supply Systems in Japan
― 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... -
Starting My Blog – April 30, 2025
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...
