June 2025– date –
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Why Disasters in Major Cities Are Especially Devastating
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... -
About the Author of This Blog
"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 ... -
Gravel Filtration: An Old Yet Innovative Water Treatment Technology!?
Sometimes, a traditional technology becomes surprisingly powerful when used in a new way. Gravel filtration is one such method—it may even transform the future of water supply systems. Gravel filtration may change the future of water sup... -
Addressing Coloration Caused by Humic Substances (Humus)
When turning mountain stream water into a public water supply, one challenge that often troubles water treatment engineers is the presence of colored substances known as humic substances.These substances, believed to dissolve into the wa... -
Generating Daily-use Water Without Tap Supply — 6 Alternative Sources and a 3-Step Purification Method (Part 5 of 5)
When a water outage lasts longer than expected—If water supply stations run dry or water trucks don’t arrive, even in such worst-case scenarios, there are still small amounts of usable water sources around you.This article provides:1. Si... -
Surviving on 20 Liters a Day After a Disaster! Water-Saving Techniques (Part 4 of 5)
── Practical Water-Saving Tips for Bathing, Toilets, and Cooking ── The average amount of water used per person per day under normal conditions is about 180 to 250 liters. However, in the event of a disaster where the water supply is cut... -
Complete Guide to Emergency Water Supply Stations During Disasters: How to Find, Line Up, and Carry Water (Part 3 of 5)
Complete Guide to Emergency Water Supply Stations During Disasters ── How to Find, Line Up, and Carry Water + Local Disaster Wells and Firefighting Water Tanks ── What You'll Learn from This Article How to locate nearby water supply stat... -
Water Supply During Disasters: When the “Unthinkable” Still Happens (Part 2 of 5)
In the previous article, we introduced the initiatives of the Tokyo Metropolitan Government Bureau of Waterworks in preparation for earthquakes. Comprehensive measures have been taken to prepare for the possibility of a future major eart... -
To What Extent Is Tokyo’s Water Infrastructure Earthquake-Ready? (Series 1 of 5)
Are you familiar with the population of the Greater Tokyo Area? Rather than administrative units such as prefectures or cities, the global standard often refers to “urban agglomerations.” According to this definition, the Greater Tokyo A...
