About the Handayama No. 3 Distribution Reservoir

The Handayama No. 3 Distribution Reservoir (半田山配水地三号配水池) is a circular distribution reservoir built in 1919 on Mount Handa in Hokaiin, Kita Ward, Okayama City, Okayama Prefecture, and was registered as a Registered Tangible Cultural Property (structure) on February 9, 2005. It lies just north of the No. 1 and No. 2 reservoirs and follows their design (Agency for Cultural Affairs).

The Agency for Cultural Affairs records it as brick and reinforced concrete, with an area of 335 square metres; registration number 33-0096, owned by Okayama City. The Handayama Distribution Reservoirs were built as part of Okayama City's original waterworks, founded in 1905 (Agency for Cultural Affairs).

Why It Was Registered

The Handayama No. 3 Distribution Reservoir was registered as a structure that would be difficult to reproduce. According to the Agency for Cultural Affairs, it was built in the first extension of the waterworks on land set aside as a reserve when the system was founded, so 14 years after the founding the city added a basin of the same shape.

How It Is Built

Around a central domical vault, the Handayama No. 3 Distribution Reservoir has 16 almost half-conical reinforced-concrete roof ribs laid out radially (Agency for Cultural Affairs), the same structural type as the original reservoirs.

Although it dates from the Taisho era, it matches the Meiji No. 1 and No. 2 reservoirs, and comparing all three shows that the site was built to one consistent design.

Visiting the Handayama No. 3 Distribution Reservoir

The Handayama No. 3 Distribution Reservoir stands within the Okayama City Handayama Botanical Garden and is open for exterior viewing only (Okayama Prefecture). Garden admission is required; hours and directions are on the Handayama Distribution Reservoirs page.

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Q&A

QWhen was the Handayama No. 3 Distribution Reservoir built?
AIn 1919, during the first extension of the waterworks.
QHow is the Handayama No. 3 reservoir roofed?
AWith 16 almost half-conical concrete ribs radiating from a central domical vault (Agency for Cultural Affairs).
QWhen was the Handayama No. 3 Distribution Reservoir registered?
AOn February 9, 2005.
QHow does it differ from the No. 1 and No. 2 reservoirs?
AIt was built later, in 1919, but to the same structural design.
QCan you visit the Handayama No. 3 Distribution Reservoir?
AYes, from outside, within the Handayama Botanical Garden; garden admission is required (Okayama Prefecture).

Basic Information

NameHandayama No. 3 Distribution Reservoir (半田山配水地三号配水池)
Location3-1 Hokaiin, Kita Ward, Okayama City, Okayama Prefecture
DesignationRegistered Tangible Cultural Property (Structure)
Year DesignatedRegistered 2005/2/9 (Heisei 17)
Quantity1 structure
DimensionsBrick and reinforced concrete, with an area of 335 square metres
OwnerOkayama City
Public AccessExterior only (inside the Handayama Botanical Garden; admission charged)

References

Handayama No. 3 Distribution Reservoir (Database of National Cultural Properties, Agency for Cultural Affairs)
https://kunishitei.bunka.go.jp/heritage/detail/101/00004631
Handayama Distribution Reservoirs (Okayama Prefecture cultural properties)
https://www.pref.okayama.jp/uploaded/attachment/260977.pdf

Last verified: 2026.10.06