A service wing running south into the back garden
The Mitsui Family Residence Connecting Corridor (三井家住宅渡り廊, Mitsuike Jūtaku Watarirō) is a single-storey timber wing of the middle Meiji era at Higashi-koken in Inuyama City, Aichi Prefecture, entered on the national register of tangible cultural properties in 2004 under the number 23-0146. The Agency for Cultural Affairs dates it within the span 1868 to 1911.
The wing leaves the main house on its south side, starting from the toriniwa, the earth-floored passage that runs the depth of the townhouse, and continuing away from the street into the back garden. It is 4 ken and 5 shaku along its length, roughly 8.8 meters, and 1 ken and 2 shaku across, about 2.4 meters. Building area comes to 27 square meters.
The roof is a single slope, laid with sangawara pantiles. Inside, a strip of doma earth floor runs along the western edge for the full length, and rooms open off it to the east: a bathroom at the north end, a lavatory at the south. Concrete blocks in the lower wall are a later repair, and the register says so plainly.
Why the Mitsui Family Residence Connecting Corridor is on the register
All 3 buildings on this plot were registered on the same day in 2004 under the criterion for structures that contribute to the historic landscape of the country. For the main house and the storehouse that landscape is the street. For the Mitsui Family Residence Connecting Corridor it is not. The Agency for Cultural Affairs describes the wing as forming one element of the view on the back-garden side, which is an unusual thing for a national register to protect: a bathroom and a lavatory, seen from a private garden.
The classification follows the same logic. The main house and the storehouse are filed under tertiary industry, the shop half of a merchant plot. The Mitsui Family Residence Connecting Corridor is filed under housing. It is the part of the property that was never for customers.
The later concrete blocks matter too. Registration does not require a building to be returned to some original state, and the record simply notes the repair as a repair. That is the ordinary condition of the 158 registered structures Inuyama held after the 2025 round of registrations, close to 27 percent of the 580 in Aichi Prefecture. They are buildings that have been mended, and the register accepts them as mended.
What the plan tells you
Japanese townhouse plans are long and narrow, and the earth-floored passage is the spine that makes them work. It carries people, goods and smoke from the street end to the back without anyone crossing a tatami room. The Mitsui Family Residence Connecting Corridor takes that spine and extends it beyond the house proper, so the walk from the shopfront to the bath was a single continuous route on one floor level.
Reading the wing from north to south gives the sequence in order: passage, bathroom, lavatory, garden. The doma strip along the west edge is what allowed all of it to be reached in outdoor footwear.
The single-slope roof is the giveaway that this is ancillary work. The main house of 1889 carries a full gable and the storehouse of 1918 turns its own gable to the lane, both of them symmetrical in section. A shed roof pitching one way is cheaper, lower and self-effacing, which is exactly what a wing of 2.4 meters width against a garden wall should be.
Visiting the Mitsui Family Residence Connecting Corridor
Be clear about this before you travel: the wing stands behind the main house and is not visible from the public lane. Inuyama City lists the owner as a private individual, there is no interior access, no admission charge and no opening hours, and there is no vantage point from which a visitor can see it.
What you can do on the ground is read the front of the plot and work out where the wing goes. Stand on the lane, find the eastern end of the main house frontage, and the toriniwa lies behind roughly 1.5 ken of that facade. The Mitsui Family Residence Connecting Corridor runs south from the far end of that passage, straight away from you. Photographs of the wing itself are published in the Agency for Cultural Affairs database, linked below.
From Meitetsu Inuyama Station, take the west exit and walk about 13 minutes north into the castle town; Inuyama Castle is roughly 600 meters beyond. If you want to see how a service wing of this kind actually sat in a townhouse plot, the former Isobe Family Residence about 200 meters south on Honmachi-dori is opened by the city without charge from 9:00 a.m. to 5:00 p.m. Its plan keeps the main house, rear parlour and storehouses in line, so the depth of a townhouse plot can be walked from front to back.
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Q&A
- Can I see the Mitsui Family Residence Connecting Corridor from the street?
- No. It stands behind the main house on the back-garden side, and there is no public vantage point. Photographs are available in the Agency for Cultural Affairs database.
- What was the Mitsui Family Residence Connecting Corridor used for?
- It held the household's washing facilities. A bathroom occupies the north end and a lavatory the south, reached along an earth-floored strip on the western side.
- When was the Mitsui Family Residence Connecting Corridor built, and what is its heritage status?
- It dates from the middle of the Meiji era, recorded in the range 1868 to 1911, and became a Registered Tangible Cultural Property in 2004 under number 23-0146.
- Why does the Mitsui Family Residence Connecting Corridor have concrete blocks in its wall?
- They are a later repair to the lower wall, and the register records them as such. Registration protects buildings in use, so subsequent repairs are documented rather than removed.
- Is the Mitsui Family Residence Connecting Corridor part of the same registration as the main house?
- No. The main house of 1889 and the storehouse of 1918 hold their own numbers, 23-0144 and 23-0145. All 3 were registered on the same day in 2004.
Basic Information
| Name | Mitsui Family Residence Connecting Corridor |
|---|---|
| Location | 684 Higashi-koken, Inuyama, Inuyama City, Aichi Prefecture |
| Designation | Registered Tangible Cultural Property (structure), registration number 23-0146 |
| Year Designated | Registered in 2004 |
| Quantity | 1 building |
| Dimensions | Timber-framed, single storey, tiled roof, building area 27 square meters |
| Owner | Private individual |
| Public Access | Not open. Stands behind the main house and is not visible from the public lane. |
References
- National Database of Cultural Properties, Agency for Cultural Affairs: Mitsui Family Residence Connecting Corridor
- https://kunishitei.bunka.go.jp/heritage/detail/101/00004252
- Cultural Heritage Online: Mitsui Family Residence Connecting Corridor
- https://bunka.nii.ac.jp/heritages/detail/169562
- National Database of Cultural Properties, Agency for Cultural Affairs: Mitsui Family Residence Main House
- https://kunishitei.bunka.go.jp/heritage/detail/101/00004250
- Inuyama City: Cultural properties of Inuyama, with the list of registered tangible cultural properties
- https://www.city.inuyama.aichi.jp/kurashi/bunka/1001063/1001068.html
- Inuyama City: The registration system for cultural properties
- https://www.city.inuyama.aichi.jp/kurashi/bunka/1001063/1001067.html
- Inuyama City: Former Isobe Family Residence, restored facility
- https://www.city.inuyama.aichi.jp/kurashi/bunka/1001052/1003550/1001061.html
Last verified: 2026.09.02