Yamamoto Rock Machine (Former Yamamoto Iron Works) Self-Governing Dormitory Family Building

Yamamoto Rock Machine Dormitory Family Building: A Three-Story Timber Home with Dormers

The Yamamoto Rock Machine (Former Yamamoto Iron Works) Self-Governing Dormitory Family Building (ヤマモトロックマシン（旧山本鉄工所）自治寮家族棟) is a 3-story timber dormitory for employees' families, built in 1937 by a rock drill maker in Tojo-cho, Shobara City, Hiroshima Prefecture, and registered as a Registered Tangible Cultural Property on 25 February 2016. It stands on the west side of the dormitory block across the road south of the factories, its ridge running north to south, with a tiled roof and a building area of 314 square meters.

The roof is a clipped gable, the top of each gable end cut back into a small hip, and dormer windows rise from its slopes. A 3-story wooden building is conspicuous enough in a small mountain town; the roofline gives it the silhouette of a Western villa as well. Of the three dormitory buildings, this is the one the volunteers restoring them have called the symbol of the site.

Why the Dormitory Family Building Was Registered

It was registered for contributing to the historic landscape. The Agency for Cultural Affairs values it as evidence of a modern industrial society in which work and home were separated. With the factories on one side of the road and housing on the other, the layout shows a small-town ironworks, once run like a family business, turning into a modern employer with a large workforce.

The interior reflects the same shift. A corridor runs along one side, with Japanese-style rooms lined up on the first and second floors. These were homes for families, which means the company housed married employees separately from the single workers in the building next door. The third floor is one open meeting room. A room for meetings built into a dormitory, together with the word "self-governing" in its name, suggests that residents had a hand in running the place.

Left empty for decades, the building deteriorated. According to the group working to preserve the dormitories, a crowdfunding campaign in 2019 raised more than its target toward re-laying this building's roof and repairing the boards and timbers beneath. The plan was to take down every tile, sort out those that could be reused, and lay them again.

What to Look For at the Dormitory Family Building

Begin with the roofline. A clipped gable trims the peak of a gable roof at an angle, so the top of the end wall becomes almost a trapezoid. Dormers climbing out of the roof slope give the attic-level third floor light and a view. Japanese clay tiles combined with Western dormers is a very early-Showa pairing.

To get a feel for the height of a 3-story timber building, follow the rows of windows up from the ground. The first- and second-floor room windows line up evenly, with the roof and dormers above. Because the corridor runs along one side, it is worth comparing the window sizes and spacing to see whether you can tell the corridor face from the room face.

Its neighbors share the same roof shape: the dining hall next door and the single employees' building to the east. Seen together, the family building stands a story taller than the rest and acts as the landmark of the dormitory block.

Visiting the Dormitory Family Building

The Yamamoto Rock Machine dormitory family building is on company land and is not open on a regular basis. The dormitory block faces the road south of the factories, so the exterior, and especially the clipped-gable roof with its dormers, can be seen from the public road. Step back a little to take in the full height.

The interior opens only during tours and events held by the preservation group or the company. Openings, exhibitions, workshops and concerts have all taken place in the old dormitories. Since repairs are ongoing, some areas may be off limits even on open days. Do not enter the grounds without permission, and photograph from the road.