About 35,000 households in Kumamoto Prefecture remain without water on Monday following a recent earthquake [1].
The disparity in recovery times highlights a critical gap in regional infrastructure resilience, as some municipalities restored service far faster than others.
Water service in Kumamoto-shi was restored on Aug. 3 [1]. This recovery occurred within one week of the earthquake, while residents in Yatsushiro-shi, Uki-shi, and Hikawa-cho continue to face outages [1].
Experts attribute the delay to a lack of seismic retrofitting in the affected pipe networks. Associate Professor Hirayama Shukyu of the Nagoya University Disaster-Reduction Collaboration Research Center said Kumamoto-shi had the most advanced retrofitting. He said the areas currently experiencing outages had not progressed as much in their seismic upgrades [1].
National efforts are underway to promote the installation of earthquake-resistant pipes to prevent such failures. An unnamed government spokesperson said the state is promoting the introduction of seismic pipes that are strong against earthquake tremors [1].
The scale of the infrastructure challenge is significant. Only about 15% of important facilities have undergone seismic retrofitting [3]. This lack of preparation has left thousands of residents dependent on alternative water sources for their daily needs.
Local residents have had to adapt to the lack of running water. One unnamed resident said they preferred certain alternative cleaning methods because they did not produce foam, which can make rinsing difficult [1].
“About 35,000 households in Kumamoto Prefecture remain without water.”
The situation in Kumamoto underscores the vulnerability of aging utility infrastructure in seismic zones. While urban centers like Kumamoto-shi have prioritized seismic retrofitting to ensure rapid recovery, smaller municipalities often lag behind due to cost or planning delays. This creates a 'resilience gap' where the speed of basic service restoration depends on the local government's previous investment in earthquake-resistant technology rather than the severity of the disaster itself.
