The Office That Joins House and Factory

The Satake Glass Office (佐竹ガラス事務所, Satake Garasu Jimusho) is a single-storey timber office building of the early Showa period in Saiwai 2-chome, Izumi City, Osaka Prefecture, entered on the national register as a Registered Tangible Cultural Property on April 24, 2001.

It belongs to Satake Glass, a maker of colored craft-glass rods founded in 1927, and is attached to the northwest side of the main house that holds the southern corner of the site. With a building area of 31 square metres it is the second smallest of the six registered buildings; only the shrine, at 2 square metres, is smaller.

Its hipped roof, finished in Sangawara-buki pantiles, is a Yosemune-zukuri form, and its ridge runs parallel to the main house. Squeezed between the family residence and the furnace sheds, the Satake Glass Office is literally where home ends and work begins.

Why It Was Registered

The Satake Glass Office was listed as a building that contributes to the historic landscape. The Agency for Cultural Affairs describes it as an indispensable part of how the property presents itself to the street.

Izumi City's heritage guide locates the value of Satake Glass in the way its traditional main house and office have been kept together with the factory. The office is what makes that unity visible. Keep only the house and you have an old residence; keep only the sheds and you have a small workshop. Put this modest office between them and the whole thing faces the street as one continuous household-cum-business.

On its own it would hardly stop you. Its value lies in the silhouette: the roofline steps down from the two-storey house to the hipped office roof before the factory begins, and that intermediate step keeps the street view from breaking.

What to Look For

On the street side, the Satake Glass Office pushes a small eave out over its frontage, the kind of canopy that marks the entrance of a traditional shop or counting house. Seen next to the latticed front of the main house, it completes a single, coherent face toward the road.

Look up at the roofs. The main house has a hip-and-gable roof, the office a plain hipped one, yet the two ridges are aligned, so the different forms still read as a pair.

On the side away from the street, according to the official description, a passage about 3 metres wide separates the office from a later extension. It reads as a working corridor for people and materials heading to the factory at the back.

Visiting the Satake Glass Office

No public access to the interior of the Satake Glass Office has been announced. Its street side, with the projecting eave, can be seen from the road in front of the property.

The passage and the extension lie inside the compound and are hard to see from outside. Satake Glass is a working factory, and tours and classes are by reservation, so please don't enter the premises unannounced. If you want to photograph the buildings, ask when you book.

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Q&A

QWhen was the Satake Glass Office built?
AThe Agency for Cultural Affairs database dates the Satake Glass Office to the early Showa period. It is a single-storey timber building with a hipped, tiled roof and a building area of 31 square metres.
QWhen did the Satake Glass Office become a Registered Tangible Cultural Property?
AThe Satake Glass Office was registered on April 24, 2001, together with the main house, melting plant, workshop, mixing factory and shrine. It was listed as a building that contributes to the historic landscape.
QWhere is the Satake Glass Office?
AThe Satake Glass Office is on the Satake Glass premises at 2-11-30 Saiwai, Izumi City, Osaka Prefecture, attached to the northwest side of the main house. The melting plant stands to its northwest.
QCan you go inside the Satake Glass Office?
ANo public access to the interior of the Satake Glass Office has been announced. Its street side is visible from the road. Factory tours on the site require a reservation.
QHow is the Satake Glass Office connected to the main house?
AThe Satake Glass Office adjoins the northwest face of the main house, and its ridge runs in the same direction. The house has a hip-and-gable roof and the office a hipped one, so two different roof forms sit on a shared axis.

Basic Information

NameSatake Glass Office
Location2-11-30 Saiwai, Izumi City, Osaka Prefecture
DesignationRegistered Tangible Cultural Property (Building)
Year DesignatedRegistered 2001/4/24 (Heisei 13)
Quantity1 building
DimensionsTimber, single storey, tiled roof; building area 31 square metres
OwnerNot listed in the ACA database (on the premises of Satake Glass Mfg. Co., Ltd.)
Public AccessNo announced interior access (exterior visible from the street)

References

Agency for Cultural Affairs, Database of National Cultural Properties: Satake Glass Office
https://kunishitei.bunka.go.jp/heritage/detail/101/00002155
Izumi City Cultural Properties Guide: Satake Glass
https://izbun.jp/introduction/shinoda/satakegarasu.html
Agency for Cultural Affairs, Database of National Cultural Properties: Satake Glass Main House
https://kunishitei.bunka.go.jp/heritage/detail/101/00002154

Last verified: 2026.09.25