Nagai Family Residence Main Building

A Dentist's Western House on the Prefectural Road

The Nagai Family Residence Main House (永井家住宅主屋, Nagai-ke Jutaku Shuoku, also read Nagai-ke Jutaku Omoya) is a two-storey Western-style timber house in Wake Town, Wake District, Okayama Prefecture, built in 1916 and entered on Japan's Register of Tangible Cultural Properties on 28 April 2000.

It stands near the confluence of the Yoshii and Kongo rivers, facing south onto the prefectural road. The site is flat river valley, the kind of place where a building with any vertical ambition announces itself from a distance.

This one has vertical ambition. A square tower rises at the southeast corner, and it is the reason the house registers on the eye before anything else does. Everything below it is domestic in scale, five ken along the front and four and a half deep, 93 square metres of floor area, a hipped roof in pantile. The tower breaks the profile and changes the reading.

German Siding, and Why That Detail Matters

The exterior cladding is what Japanese carpentry manuals call Doitsu shitami, German siding. Instead of overlapping boards in the ordinary weatherboard manner, each plank is milled with a concave hollow along its upper edge so that the boards seat flush against one another. The result is a wall surface with a shadow line but no stepped profile.

The technique arrived in Japan through the imported Western building trades of the Meiji era and remained a marker of a certain level of ambition and budget. On a small provincial building in 1916 it signals a client who had seen city architecture and wanted some of it.

That client was a dentist. The house was built as a dental clinic with living quarters attached, in an era when the profession was new enough in rural Okayama that its practitioners tended to advertise modernity through their premises. Local accounts describe it as among the earliest Western-style buildings in the Tobi area, the eastern edge of Okayama Prefecture. Being first is part of why the town still points it out.

What Registration Recognises

The registration criterion applied here is the one covering buildings that contribute to the historic landscape of the nation. That is a different argument from the one made for architecturally exceptional buildings. It says the value lies partly in the building's relationship to its setting, in what the street loses if the house disappears.

Registration number is 33-0047, awarded in the twenty-third round. Registration took effect on 28 April 2000, with public notice on 17 May of that year.

Wake Town holds three registered structures in total. The other two are the Saeki-cho Furusato Kaikan, a 1932 reinforced-concrete village office, and the Mandai Family Residence Main House of 1872. Set against those, the Nagai house occupies the middle of a sixty-year span in which the town's building culture shifted from traditional carpentry to imported forms and then to concrete.

To be clear about status: this is a Registered Tangible Cultural Property, the lighter of Japan's two protective categories for buildings. It is not an Important Cultural Property. Wake Town does hold one of those, the Former Okuni Family Residence, which is a separate and considerably older property.

Seeing It, and the Limits of That

The Agency for Cultural Affairs record lists no owner, which in practice indicates private ownership. There is no visitor programme, no opening hours, no admission desk. The house is somebody's property and, so far as published information shows, remains in private hands.

What this means practically: view it from the public road, and stop there. The south elevation and the corner tower are both visible from the prefectural road, which is where the architecture was designed to be seen from anyway. Photograph the exterior from public ground if you wish. Do not enter the site, do not approach windows, and do not knock.

Wake Station on the JR Sanyo Main Line is the access point, and the town centre is compact enough to cover on foot. Wake Shrine and its wisteria park lie a short distance away, and the Former Okuni Family Residence is also in the town centre, so a walking circuit through Wake can take in several buildings without difficulty.

Check with the Wake Town Board of Education if you need current information on the building's condition or on any occasional opening. Registered private houses sometimes open for one-off events, and the town publishes such announcements when they occur.