How To Check If A Japanese Property Has A Private Road

A private road is its own parcel, with its own owner

A road, public or private, is normally its own separate parcel (筆, fude) with its own lot number (地番, chiban) — it is not part of the house lot's registration record. A 公道 (koudou, public road) is owned and managed by the national government, a prefecture, or a municipality under the Road Act (道路法). A 私道 is simply privately owned land that functions as a road instead. Ownership of a private road generally falls into one of a few patterns: a single private owner (often the developer who originally subdivided the land, or one specific neighboring landowner), or co-ownership (共有, kyouyuu) split between the owners of the lots that front it, each holding a share (持分, mochibun). Which pattern applies is a fact about that specific road, not something you can assume from how the street looks.

Confusingly, a privately owned road can still carry the registered land category (地目, chimoku) of 公衆用道路 ("land for public road use") — one of the 23 land categories set out in the Ordinance on Real Property Registration (不動産登記規則, Art. 99). This category reflects how the land is actually used, not who owns it: land used by the general public for passage can be registered as 公衆用道路 whether the owner is a public body or a private individual. In other words, seeing 公衆用道路 as the 地目 on the road's own record tells you the land functions as a road; it does not tell you the road is publicly owned, and it says nothing about whether it satisfies the Building Standards Act's road-frontage requirement.

Position-designated roads: privately owned, with two legal limits on what the owner can do

The most common way a private road ends up counting as a legal road for construction purposes is 位置指定道路 (ichi shitei douro, a "position-designated road") under Article 42, paragraph 1, item 5 of the Building Standards Act (建築基準法). Developers who subdivide a plot of land into multiple house lots often need to carve out a private road to give each new lot the road frontage the building code requires; to make that private road count as a legal road, the developer applies to the local government (特定行政庁) for a position designation, which requires the consent of everyone with a registered interest in the road-parcel land and of whoever will maintain the road going forward.

Once designated, the road keeps its private ownership, but two separate provisions limit what the owner can do with it. Article 44 bars building any structure (aside from a narrow list of exceptions, such as a public toilet or gatehouse, that need building review board approval) inside the road area — the same restriction that applies inside a public road. Article 45 separately lets the local government (特定行政庁) prohibit or restrict a change or abolition of a private road when doing so would put an abutting building lot's road frontage out of compliance with Article 43, paragraph 1 — this is a power the local government can exercise, not an automatic, self-executing ban on every kind of obstruction. In practice, that means a co-owner is exposed to enforcement action if they fence off or repurpose their share in a way that breaks a neighbor's frontage, and changing or abolishing the designation itself still needs the local government's approval plus the consent of everyone with an interest in the road — but it is an administrative check that depends on the local government actually applying it, not a private passage right you can invoke directly.

Narrow existing roads and the setback rule (42条2項道路)

A second common pattern, especially with older houses, is a narrow road that predates the Building Standards Act's current road-width rules — generally under the 4-meter minimum width the Act otherwise requires. Article 42, paragraph 2 lets a municipality "deem" such an existing narrow road (commonly called a 2-koudouro or minashi douro) a legal road anyway, on the condition that any new or rebuilt structure on an abutting lot sets its building line back so that, over time, the road reaches the required 4 meters (セットバック, setback). The strip ceded for the setback is frequently still privately owned by the abutting lot owner even after building rights over it are given up — worth confirming rather than assuming it has been formally transferred or merged into the road parcel.

Why ownership structure is a practical risk, not just a paperwork detail

A private road carries no guarantee of public maintenance. Paving, drainage, and repair costs generally fall to whoever owns or uses the road, typically split informally — or under a written agreement — among the frontage owners. A road solely owned by one neighbor, rather than co-owned, puts a buyer in a materially weaker position: continued access depends on that owner's cooperation unless a separate registered right, such as an easement, or the statutory right of passage for landlocked land under Civil Code Art. 210, actually covers it (see our easement guide for how those rights work and how to check for them). None of this shows up by looking at the pavement from the street.

Here is a practical way to check before you get attached to a listing:

1. Identify the road as its own parcel. Confirm on the cadastral map (公図) or with the lot number search whether the road you would use to access the property is a separate parcel from the house lot, and get that parcel's own lot number.
2. Order the registration record for the road's own lot number, not just the house lot. Read its ownership section (甲区): is there a single owner, or is it co-owned (共有) with recorded shares? Check its 地目 as well — 公衆用道路 confirms the land is used as a road, but does not by itself tell you the road satisfies the Building Standards Act's road-frontage rule.
3. Ask the municipal building guidance division (建築指導課) what the road's legal status actually is. Whether it is a position-designated road (位置指定道路, 42条1項5号), a deemed narrow road requiring setback (42条2項), or not a legal building road at all is a separate administrative record the division can confirm — often by producing the designated-road map for that address. This determines whether a rebuild is even possible in the first place, before ownership matters at all.
4. If the road is co-owned, ask for any private maintenance or cost-sharing agreement. These are typically private arrangements between neighbors and are not filed at the Legal Affairs Bureau, so the registration record will not show them. Ask the agent directly whether one exists and what it covers.
5. If a single neighbor owns the road outright, check what access right you would actually have. A registered easement and the landlocked-parcel right of passage under Civil Code Art. 210 are the strongest bases, since neither depends on the current owner's goodwill. Access can also rest on an unregistered agreement with the current road owner — a consent letter or an informal, longstanding permission — but that is a personal arrangement between those two parties and is not guaranteed to bind whoever buys the road next; ask for it in writing and ask directly what happens if the road changes hands. Treat "the road has always been used this way" as a starting point for questions, not a substitute for checking.
6. Treat inconsistent tax treatment as a signal worth asking about. A private road that genuinely functions as an open, unrestricted through-road can, in some municipalities, qualify for a fixed asset tax exemption as land "for public use" under the Local Tax Act (地方税法, Art. 348, para. 2, item 5) — municipalities set their own specific criteria and require an application, so this is not automatic. If the seller or agent mentions the road is billed as ordinary taxable land, that alone is not a legal problem, but it is worth asking why, since it can reflect a more limited or contested use pattern than a fully open road.
7. Bring a judicial scrivener (司法書士) or local land-use professional in for anything unresolved. Disputed shares, an uncooperative co-owner, or a maintenance agreement that needs to be formalized or updated at closing are exactly the kind of thing worth a professional opinion before you commit.

The most common mistake is assuming a paved, used-looking street is publicly maintained simply because several houses share it. The second is assuming that because a private road is "designated," the private owner has effectively lost the property to the public — ownership stays private even though the owner's control over the land is narrowed by the designation.

What the registry can and cannot tell you here:

• What it shows reliably: who owns the road parcel itself — a sole owner or co-owners with recorded shares — and the road parcel's registered land category (地目), including whether it is registered as 公衆用道路.
• What it does not show: whether the road has been designated a legal road under the Building Standards Act (位置指定道路 or a deemed 42条2項 road) — that is a separate administrative record held by the municipal building guidance division, not the Legal Affairs Bureau; whether a private maintenance or cost-sharing agreement exists among the road's users; and whether the road currently qualifies for a fixed asset tax exemption, which each municipality decides under its own criteria.
• How to order the record: On Japan Property Research, the road is simply a different parcel with its own lot number — order its land registration record for ¥1,500, the same product as for the house lot. If you don't already know the road's lot number, our free lot-number search and parcel map view usually get you there from the map; the official parcel map (公図, +¥500, included on Pro and Team plans) gives a clearer look at the road parcel's boundary against the house lot.

A private road is not a reason to walk away from a property by itself — most function without incident for decades. It is a due-diligence item worth pricing in before you buy: who owns it, whether it is legally a road at all for building purposes, and who is actually on the hook for keeping it in repair. Our Japan property due diligence checklist covers where this check fits alongside ownership, boundaries, and rebuildability review.

FAQ

What is a private road (私道) in Japan? It is privately owned land that functions as a road, as opposed to a 公道 (public road) owned and managed by a national, prefectural, or municipal government under the Road Act. It is normally its own separate parcel with its own lot number, distinct from the house lots that front it.

How do I find out who owns the private road in front of a property? Identify the road as its own parcel using the cadastral map or a lot number search, then order the registration record for that parcel and read its ownership section (甲区). It will show whether the road has a sole owner or is co-owned, and by whom.

Does a private road count as legal road frontage for building or rebuilding? Only if it has the right legal status — typically either a position-designated road (位置指定道路) under Building Standards Act Art. 42, paragraph 1, item 5, or a deemed narrow road under Art. 42, paragraph 2 that requires a building setback. Ownership alone does not decide this; the municipal building guidance division confirms a road's legal status.

Who pays for repairs and maintenance on a private road? There is no general rule requiring the municipality to maintain a private road. Cost generally falls to whoever owns or uses it, often split among the frontage owners informally or under a private agreement that will not appear on the registration record.

Can a private road's owner block my access? A sole owner has more practical leverage than co-owners would. A registered easement or the statutory right of passage for landlocked land (Civil Code Art. 210) are the strongest protections, since both are independent of the owner's goodwill — see our easement guide for how to check for either. An unregistered passage agreement with the current owner can grant access in practice, but as a personal arrangement between those two parties it is not guaranteed to bind whoever buys the road next, so get it in writing and ask what happens if ownership changes. Separately, if the road carries a Building Standards Act position designation, Article 44 bars building inside it and Article 45 lets the local government restrict a change or abolition that would break an abutting lot's road frontage — but that is an administrative check on the owner, not a private right of passage you can invoke directly.

Related guides:

• How To Check If A Japanese Property Is Rebuildable
• How To Check If A Japanese Property Has An Easement
• How To Check Land Boundaries In Japan
• How To Read A Japanese Property Registration Record
• Japan Property Due Diligence Checklist
• How To Order A Japan Property Registration Record In English

• Building Standards Act (建築基準法), Article 42 — Definition of "road," including paragraph 1, item 5 (position-designated roads) and paragraph 2 (deemed narrow roads and the setback rule) — Ministry of Justice, Japanese Law Translation
• Building Standards Act (建築基準法), Article 43 — Site's Road Access, and Article 44 — Restriction on Buildings within a Road — Ministry of Justice, Japanese Law Translation
• Building Standards Act (建築基準法), Article 45 — Restriction on Change or Discontinuance of a Private Road — Ministry of Justice, Japanese Law Translation
• Civil Code (民法), Article 210 — Right of Passage over Land Enclosed by Other Land — Ministry of Justice, Japanese Law Translation
• Ordinance on Real Property Registration (不動産登記規則), Article 99 — the 23 registered land categories (地目), including 公衆用道路 (land for public road use) — Ministry of Justice, Japanese Law Translation
• 道路位置指定（建築基準法第42条第1項第5号）— procedure, consent requirements, and restrictions on designated private roads — City of Yokohama
• 「公共の用に供する道路」に係る事務処理要領 — municipal criteria for the fixed asset tax exemption on roads for public use, including privately owned roads — City of Osaka

A note on scope: Article 42 of the Building Standards Act and Article 210 of the Civil Code apply nationwide, but whether a specific private road has actually received a position designation, and whether it currently qualifies for a fixed asset tax exemption, are administrative determinations each municipality makes on its own facts and its own published criteria. Confirm both directly with the municipal building guidance division and tax office for the property you are considering, rather than assuming the general rule settles either question for a specific road.