A Concrete Tower Built for Five Thousand People
The Former Kodama Water Tower (児玉町旧配水塔, Kodama-machi Kyū Haisuitō) is a reinforced concrete distribution tower in the Kodama district of Honjo City, Saitama Prefecture, completed in 1931 and entered on the national register of Tangible Cultural Properties on 18 October 2000. It was Saitama's third water tower and, by one count, the seventh built anywhere in Japan.
The tower went up as part of a municipal waterworks program that the town of Kodama carried out across the Showa years 3 to 9, between 1928 and 1934. Kodama then had a population of around five thousand. Piped drinking water for a town that size was an ambitious undertaking in the early Showa period, and the tower was its most conspicuous component.
Inside, the structure divides into two functional zones stacked vertically. The lower part houses a pump room that lifted water from the source. The upper part is a cylindrical elevated tank capped with a domed ceiling. Water raised into that tank then fed the town's mains by gravity alone, which is why the tower had to be tall and why height was the whole design problem.
The tower supplied Kodama until 1955, when the system was superseded. It has never been demolished. Today it carries the town's time signal, chiming the hours over a district that has since been absorbed into Honjo City.
Why a Utility Structure Earned Cultural Property Status
Registered Tangible Cultural Properties (登録有形文化財, tōroku yūkei bunkazai) differ from Important Cultural Properties and National Treasures in both process and intent. Designation, the system that produces National Treasures, is highly selective and imposes permission requirements on owners. Registration, established in 1996, is a notification system covering buildings over fifty years old that merit preservation but do not need, or would not survive, the heavier regime.
The register was designed with modern infrastructure very much in mind. Bridges, dams, brick warehouses, pumping stations, and water towers had been falling outside the older framework, which had grown up around temples, shrines, and castles. Honjo City now holds eight registered properties and the list reads accordingly: a brick silk warehouse of 1896, a post office of 1934, a stone arch bridge of 1889, the Mase Dam of 1937, and this tower.
Registration number 11-0025 was granted under the criterion that the structure contributes to the historic character of the national landscape. The reasoning is visible from any street corner in Kodama. A slender white cylinder rising above a low-rise town works as a landmark even for people who have no idea what it once did, and it fixes the moment when a rural Saitama town acquired modern municipal water.
The designer is recorded as Miyahara Yūjirō, an engineer in the employ of Saitama Prefecture. Prefectural sources describe the achievement as bringing a purely functional facility together under a symbolic form. That reading holds up. Nothing about gravity-fed water distribution required a lantern-like silhouette, round windows, or a decorative lightning rod, and Miyahara supplied all three.
Looking at It Up Close
The interior is closed and there is no arrangement for entry. Viewing is from outside, at any hour, at no charge.
The finish is mortar rendered over the concrete shell, which gives the tower a pale, slightly chalky surface quite unlike the raw board-marked concrete of later decades. The entrance and the stair enclosure project forward from the cylinder as a single vertical spine, and that projection is what keeps the tower from reading as a plain drum. It creates a front.
Circular windows punctuate the shaft. They are small relative to the wall and their spacing follows the internal stair, so they climb rather than sit in rows. The blue-painted door at the base is often the first thing visitors mention, a flat plane of color against the mortar. At the summit, the lightning conductor is detailed rather than merely installed.
One point of caution for anyone checking figures. The Agency for Cultural Affairs database gives the height as 18 meters in its structural summary but 17.5 meters in its descriptive text on the same page, and Honjo City's own cultural properties page states 17 meters. The 17.5 meter figure appears most consistently across sources, but the discrepancy is unresolved in the published record.
Kodama Station on the JR Hachikō Line is the nearest rail access, five to eleven minutes on foot depending on which source you follow and which exit you use. The walk itself is worth taking slowly, since the tower disappears and reappears between buildings. For anyone making a day of Honjo's modern heritage, the former Honjo Commercial Bank brick warehouse near Honjo Station and the Mase Dam in the hills west of Kodama complete the picture of how much civil engineering this area produced between the 1890s and the 1930s. Inquiries go to the Honjo City Cultural Properties Protection Division.
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Q&A
- Can I go inside the Former Kodama Water Tower?
- No. The interior is closed to the public and there is no regular opening or guided access. The tower stands in the open and can be viewed and photographed from the surrounding streets at any time without charge.
- How tall is the Former Kodama Water Tower?
- Published figures disagree. The Agency for Cultural Affairs lists 18 meters in its structural field and 17.5 meters in its explanatory note, while Honjo City states 17 meters. The 17.5 meter figure recurs most often in secondary accounts, but visitors should treat the exact height as unsettled.
- Is the Former Kodama Water Tower still in use?
- Not for water. It supplied the former town of Kodama until 1955 and now functions as a time signal tower, sounding the hours for the district. Honjo City owns and maintains the structure.
- How do I get to the Former Kodama Water Tower by train?
- Take the JR Hachikō Line to Kodama Station. The tower is at 323-2 Kodama, Kodama-machi, roughly five to eleven minutes on foot. The Hachikō Line runs from Hachiōji via Takasaki and is infrequent, so check the timetable before setting out.
- What makes the Former Kodama Water Tower architecturally interesting?
- It is an early Showa reinforced concrete structure whose designer, the prefectural engineer Miyahara Yūjirō, gave a purely functional gravity-feed water tank a deliberately symbolic form. The projecting stair enclosure, the circular windows, the domed tank ceiling, and the detailed lightning rod are design decisions rather than engineering necessities.
Basic Information
| Name | Former Kodama Water Tower (児玉町旧配水塔) |
|---|---|
| Location | 323-2 Kodama, Kodama-machi, Honjo City, Saitama Prefecture |
| Designation | Registered Tangible Cultural Property (Structure), registration no. 11-0025 |
| Year Designated | Registered 18 October 2000; gazetted 6 November 2000 |
| Quantity | 1 structure |
| Dimensions | Reinforced concrete with mortar render; height given as 18 m in the national database structural field and 17.5 m in its descriptive note |
| Owner | Honjo City |
| Public Access | Exterior only, viewable at any time free of charge. Interior closed. |
References
- National Database of Cultural Properties, Agency for Cultural Affairs: Former Kodama Water Tower
- https://kunishitei.bunka.go.jp/heritage/detail/101/00001901
- Cultural Heritage Online: Former Kodama Water Tower
- https://online.bunka.go.jp/heritages/detail/139171
- Honjo City Board of Education: Nationally Registered Tangible Cultural Properties
- https://www.city.honjo.lg.jp/soshiki/kyoikuiinkai/bunkazai/tantoujouhou/bunkazai/1375759852044.html
- Honjo City Tourism Association: Former Kodama Water Tower
- https://www.honjo-kanko.jp/sightseeing/point/kodama-chokyuhaisui-to/
Last verified: 2026.08.10