What the Mandai Family Residence Main House Is

The Mandai Family Residence Main House is a house built in 1872 in Hara, Wake Town, Okayama Prefecture, and was registered as a national Registered Tangible Cultural Property on July 8, 1999.

In Japanese the building is called Mandai-ke Jūtaku Shuoku (万代家住宅主屋). It is the house where Mandai Kaheiji was born; he went on to serve as head of his home village of 石生 (now part of Wake Town), as a member of the Okayama Prefectural Assembly, and as a member of the House of Representatives. That family history is what people in Wake usually mention first, but the Agency for Cultural Affairs registered the Mandai residence for the shape of its roof.

On paper it is a single-storey timber house with a tiled roof and a footprint of 194 square meters. In practice there is a low upper floor tucked under the roof, the kind of attic storey called Tsushi-nikai. Okayama Prefecture gives the plan as nine and a half ken by five and a half ken (a ken is the traditional bay of roughly 1.8 meters) and notes that the upper level is covered by its own Irimoya-zukuri hip-and-gable roof.

Why the Mandai Family Residence Main House Was Registered

The registration criterion cited for the Mandai Family Residence Main House is that it "serves as a model of form," and its registration number is 33-0030. Registration was announced in the official gazette on July 21, 1999.

The roof is built in two tiers. Below the upper roof, the wall of the attic storey is finished in Namako-kabe, the white-on-dark grid of plaster joints that protects the wall from rain. The lower roof is a deep Hisashi whose eaves rest on a single thick log rather than on sawn timber. Both habits are common in houses of this area. The point the agency makes is that the Mandai house is a comparatively early dated example of them, which makes it a useful reference for when the local type took shape.

Details to Look For

Photographs published by Wake Town show a white-walled front with a sliding entrance door at the center, and above the low ground-floor roof a second, hipped-and-gabled roof sitting over the attic level. From a distance the house reads as a single-storey building with one more roof stacked on top, which is exactly how a tsushi-nikai house is meant to look. The namako-kabe band gives the Mandai house its crisp black-and-white stripe.

Wake Town also points to the roof frame, assembled from logs shaped with a chōna adze and jointed together in a complicated web, as evidence of a high level of carpentry. Like the log that carries the eaves, these members keep the natural curve of the tree.

According to the prefecture, the front of the house centers on a six-mat entrance room with a raised Shikidai step, next to a ten-mat formal room with an alcove one and a half ken wide and a side alcove of one ken. The rear holds a storeroom, a Buddhist altar room and a living room in a row of four rooms. The formal front rooms suit a family that produced a village head and a member of the national parliament.

Visiting the Mandai Family Residence Main House

The Mandai Family Residence Main House is a private home and is not open to the public. Okayama Prefecture lists it as not open, and Wake Town marks it as not available for visits. No interior viewings or special openings have been announced.

On a map, Hara lies about 1.5 kilometers west of JR Wake Station on the San'yō Main Line in a straight line. There are no official directions, parking or photography guidelines. If you pass by, stay off the property and private lanes and keep in mind that people live here. Photographs of the house can be seen on the Wake Town and Cultural Heritage Online pages listed below.

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Q&A

QCan I visit the Mandai Family Residence Main House?
ANo. It is a private home, and both Okayama Prefecture and Wake Town state that it is not open to visitors.
QWhen was the Mandai Family Residence Main House built and registered?
AIt was built in 1872 and registered as a Registered Tangible Cultural Property on July 8, 1999 (registration number 33-0030).
QWhat is special about the roof of the Mandai Family Residence Main House?
AThe roof is built in two tiers. The wall under the upper roof is finished in namako-kabe plaster, and the eaves of the lower roof rest on one thick log. These are local practices, and the Mandai house is a comparatively early example.
QWho was born in the Mandai Family Residence Main House?
AMandai Kaheiji, who served as head of his home village, as an Okayama prefectural assemblyman and as a member of the House of Representatives.
QWhere is the Mandai Family Residence Main House, and what is the nearest station?
AIt is in Hara, Wake Town, about 1.5 kilometers west of JR Wake Station in a straight line. As a private home it has no official directions or parking.

Basic Information

NameMandai Family Residence Main House (万代家住宅主屋)
Location371 Hara, Wake-cho, Wake-gun, Okayama Prefecture
DesignationRegistered Tangible Cultural Property (Building)
Year DesignatedRegistered July 8, 1999
Quantity1 building
DimensionsBuilding area 194 square meters (single-storey timber house with attic storey, tiled roof)
OwnerNot listed in the Agency for Cultural Affairs database (private home)
Public AccessNot open to the public

References

Database of National Cultural Properties: Mandai Family Residence Main House (Agency for Cultural Affairs)
https://kunishitei.bunka.go.jp/bsys/maindetails/101/00001206
Mandai Family Residence Main House (Cultural Heritage Online)
https://online.bunka.go.jp/heritages/detail/177426
Mandai Family Residence Main House (Okayama Prefecture, Registered Tangible Cultural Properties)
https://www.pref.okayama.jp/uploaded/attachment/260958.pdf
Buildings (Wake Town)
https://www.town.wake.lg.jp/soshiki/shakaikyoiku/gyomu/12/1/266.html
Mandai Family Residence Main House (Digital Okayama Encyclopedia)
https://digioka.libnet.pref.okayama.jp/detail-jp/id/kyo/M2008053015591518078

Last verified: 2026.10.03