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Japan's Gutters: Crystal Clear Havens for Koi Fish
27 Nov, 2025
Summary
- A viral video showcases crystal-clear gutters in Japan teeming with koi fish.
- These Japanese gutters are natural spring-fed drainage canals, not sewage systems.
- Koi fish were introduced in the 1970s to Shimabara's waterways to attract tourism.
A captivating video of Japan's gutters has gone viral, showcasing an unexpected underwater world. The clip reveals vibrant koi fish swimming gracefully in remarkably clear water, surprising social media users worldwide. This natural spectacle is located on Koi no Oyogu Machi Street in Shimabara, a city on Kyushu island.
Contrary to initial assumptions, the featured gutters are not part of the city's sewage system. Instead, they are natural drainage canals fed by pristine spring water. The presence of hundreds of colorful koi fish is a deliberate initiative, with these fish having been introduced to the waterways in the 1970s specifically to enhance the city's appeal to tourists.
This unique feature has garnered significant attention, with many online commenters expressing awe at the cleanliness and beauty of Shimabara's canals. The video serves as a testament to Japan's meticulous environmental care and its innovative approach to integrating natural elements into urban aesthetics, creating an enchanting experience for visitors.
