The "Hexagon Hall" of the Ube Waterworks

The Momoyama Water Metering Room (桃山配水計量室) is an octagonal water metering house of 1924 in Kogushi, Ube City, Yamaguchi Prefecture, and was registered as a Registered Tangible Cultural Property (structure) on November 5, 1997 (Agency for Cultural Affairs).

The Agency records a single-storey brick building with a building area of 30 square metres; registration number 35-0007.

An Octagon Called the Hexagon Hall

The Momoyama Water Metering Room is a small single-storey brick building on an octagonal plan, set among houses on a hillside and widely known by the nickname Rokkakudo, the "hexagon hall" (Agency for Cultural Affairs).

It now has a flat concrete roof, but when first built it was crowned with an eight-sided pyramid roof (Agency for Cultural Affairs).

Why It Was Registered

The Agency notes that it is widely loved in its neighbourhood as the "hexagon hall" and registered it for its contribution to the historic landscape.

What to Look For

Look at the eight brick walls of its octagonal plan (Agency for Cultural Affairs).

Visiting

It is owned by Ube City (Agency for Cultural Affairs). The two structures are introduced together on the Momoyama Waterworks page. No official visiting information was found.

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Q&A

QWhen was it built?
AIn 1924 (Agency for Cultural Affairs).
QWhy is it called the hexagon hall?
AThat is its local nickname, though its plan is octagonal.
QIs the roof original?
ANo; the first roof was an eight-sided pyramid, now replaced by a flat concrete roof.
QWhere is it?
AAmong hillside houses in Kogushi, Ube City, Yamaguchi Prefecture.
QWhen was the Momoyama Water Metering Room registered?
AOn November 5, 1997 (Agency for Cultural Affairs).

Basic Information

NameMomoyama Water Metering Room (桃山配水計量室)
Location175-9 Kogushi, Ube City, Yamaguchi Prefecture
DesignationRegistered Tangible Cultural Property (Structure)
Year DesignatedRegistered 1997/11/05 (Heisei 9)
Quantity1 building
DimensionsSingle-storey brick, 30 m²
OwnerUbe City
Public AccessNo official visiting information

References

Momoyama Water Metering Room (Database of National Cultural Properties, Agency for Cultural Affairs)
https://kunishitei.bunka.go.jp/heritage/detail/101/00000366

Last verified: 2026.10.21