What the Abashiri Prison Museum Back Gate Guardhouse is
The Abashiri Prison Museum Back Gate Guardhouse (博物館網走監獄裏門哨舎, Hakubutsukan Abashiri Kangoku Uramon Shōsha) is a single-storey timber sentry post in Yobito, Abashiri City, Hokkaido, dated to 1912 and listed as a national Registered Tangible Cultural Property on 13 August 2012. Its floor area is 1.9 square metres and its plan is a hexagon.
It stood at the back gate of Abashiri Prison, where a warder had to watch two things at once: people arriving from outside and prisoners passing through the gate. Glass fills all six faces, so a single turn on the spot covers every direction.
The sheet-metal roof rises into a dome, and a finial shaped like a spear tip sits at its peak. Below the windows the walls are finished in Shitami-itabari. That is a good deal of detailing for a building smaller than a garden shed.
Where the design came from
Guard posts of this kind followed a standard drawing issued by the Home Ministry in 1880 and appeared at prisons throughout Japan, placed beside entrances and workshops to watch for intruders and to keep prisoners in view. Each prison varied the design, and Abashiri had eight of them within its walls.
The construction date is not agreed. The Agency for Cultural Affairs national database gives 1912 for the Abashiri Prison Museum Back Gate Guardhouse, while the museum's own signage records the date as unknown. This article follows the Agency's database as the primary record. The post remained in use until about 1985 and was moved to the present grounds in 1992.
Why it is a Registered Tangible Cultural Property
The Abashiri Prison Museum Back Gate Guardhouse was registered under the criterion of being a model of design, with registration number 01-0131. A watch box is about as utilitarian as a building gets, yet somebody clearly made choices about how this one would look.
A domed roof, a finial, boarded lower walls, glass on every face: the vocabulary is small, but none of it is accidental. Structures of this type have almost entirely disappeared from Japanese prisons, and this one keeps the form set out in the Meiji-era drawing.
What to look for
Start with the roof. Sheet metal has been worked into a dome, and a slim spear-shaped finial rises from the top. No record explains why a watch box was given that profile, though it certainly makes the building easy to pick out across the compound.
Then check the height of the glass. The sills sit at the eye level of a standing man, and everything above the boarded skirt is window. Concealment was not the point; seeing was.
Stand at one of the corners and look through two adjoining panes at once. The view runs on without a break. Within 1.9 square metres, the Abashiri Prison Museum Back Gate Guardhouse is shaped around that single requirement.
Visiting
The Abashiri Prison Museum Back Gate Guardhouse is an outdoor exhibit at the Abashiri Prison Museum. At 1.9 square metres it cannot be entered, so viewing is from the outside, though the glazing on all six faces lets you read the interior clearly enough.
Admission is 1,500 yen for adults, 1,000 yen for high school students and 750 yen for elementary and junior high school students. Visitors presenting a disability certificate pay 750 yen, and Abashiri residents receive 20 percent off. The museum is open from 9:00 a.m. to 5:00 p.m., last admission 4:00 p.m., and closes on 31 December and 1 January.
Photography is permitted apart from certain exhibits and marked areas. Filming for upload to video-sharing sites and live streaming are not allowed.
From JR Abashiri Station the museum is about 4 kilometres: 10 minutes by bus or 7 minutes by car. Memanbetsu Airport is about 20 minutes away by car. Parking is free. The grounds are large, so a small structure like the Abashiri Prison Museum Back Gate Guardhouse is easier to find if you mark it on the site map first.
Q&A
- What was the Abashiri Prison Museum Back Gate Guardhouse used for?
- It was the sentry post at the back gate of Abashiri Prison, staffed by a warder who watched arrivals from outside and monitored prisoners moving through the gate.
- Why is the Abashiri Prison Museum Back Gate Guardhouse hexagonal?
- To remove blind spots. With a window in each of six faces, one person inside could cover the full circle. The form follows the standard drawing issued by the Home Ministry in 1880.
- How big is the Abashiri Prison Museum Back Gate Guardhouse?
- Its floor area is 1.9 square metres, the smallest of the guard posts registered at the museum. There was room for one warder to stand watch and nothing more.
- Can visitors go inside the Abashiri Prison Museum Back Gate Guardhouse?
- No. The building is too small to enter, but all six faces are glazed, so the interior is visible from outside.
- Is a reservation needed to see the Abashiri Prison Museum Back Gate Guardhouse?
- Not for individual visitors. General admission to the Abashiri Prison Museum covers it during opening hours. Groups of 20 or more receive a 20 percent discount.
Basic Information
| Name | Abashiri Prison Museum Back Gate Guardhouse |
|---|---|
| Location | 1-1 Yobito, Abashiri City, Hokkaido |
| Designation | Registered Tangible Cultural Property (Structure) |
| Year Designated | Registered in 2012 (Heisei 24) |
| Quantity | 1 building |
| Dimensions | Floor area 1.9 square metres |
| Owner | Abashiri Prison Preservation Foundation |
| Public Access | Open to the public (9:00 a.m. to 5:00 p.m., last admission 4:00 p.m.) |
References
- Agency for Cultural Affairs, National Cultural Properties Database: Abashiri Prison Museum Back Gate Guardhouse
- https://kunishitei.bunka.go.jp/bsys/maindetails/101/00009256
- Abashiri Prison Museum: Guard Huts
- https://www.kangoku.jp/exhibits/guard-post
- Abashiri Prison Museum: Visitor Information
- https://www.kangoku.jp/info/visit
Last verified: 2026.09.13