Did you know that a pair of water towers stands gracefully in Setagaya? These aren’t just any towers. They’re the Komazawa Water Supply Station.
The Komazawa Water Supply Station is a vital part of Tokyo’s water history. It once supplied water to the old Shibuya area. These towers were designated as Setagaya’s first local landscape resource in December 2002.
Let’s step back in time to the early 20th century. Shibuya was growing fast. The town needed a reliable water supply. So, in 1917, Shibuya commissioned Nakajima Engiji. He was a doctor of engineering at Tokyo Imperial University. Nakajima designed the town’s water system.
The plan was ambitious. Water would be drawn from the Tama River. A filtration plant would purify it. Then the water would travel to the Komazawa Water Supply Station. From there, pumps would lift water into the towers. Gravity would then send it to Shibuya.
Construction began in 1921. The Great Kanto Earthquake struck before it finished. Fortunately, the towers survived undamaged. They began operating in 1924. The Komazawa Water Supply played a critical role in supplying water.
The Komazawa Water Supply towers have a unique design. They have a crown-like top. People call them “crowns on the hill”. These towers were loved by locals. In 2012, the Japan Society of Civil Engineers recognized them. The society chose the Komazawa Water Supply as a Civil Engineering Heritage site.
The water towers stopped operating in 1999. But they are not forgotten. The Komazawa Water Supply still serves as an emergency water reserve. It stands as a symbol of the area.
The Komazawa Water Tower Landscape Assets Preservation Society works hard. It preserves the towers. It promotes their history. The society organizes tours and events. It raises awareness of this important landmark.
Look closely at the towers’ design. Notice the details like the Greek-style columns. Above them are crown decorations. Originally, these crowns held twelve purplish glass balls each. These were removed in 2003. They were replaced with new decorative balls. One of the original glass balls is preserved. You can view it at the弦巻区民センター.
The Komazawa Water Supply’s influence goes beyond its water functions. The facility has been selected as one of Setagaya Hyakkei. It is also listed as one of Tokyo’s famous waterways.
As we conclude our visit, remember the Komazawa Water Supply. This is more than just infrastructure. It is a symbol of innovation and community pride.