How To Check Registered Vs Actual Land Area In Japan

The registered area is a record, not a measurement you can rely on blindly

The land registration record (登記事項証明書) states a land area (地積) for every parcel. That figure is only as accurate as the survey it originally came from. Land registered under older, less precise methods can show an area that differs from what a modern measurement would find — practice calls this 縄伸び (nawanobi, actual area larger than registered) or 縄縮み (nawachijimi, actual area smaller than registered). Neither is, on its own, a sign of fraud or of anything wrong with the seller; it is a common feature of older land that has never been resurveyed.

Two ways of selling the same land

Japanese land sales are commonly described as one of two types, and the contract wording decides which one you are in:

• 公簿売買 (sale by registered area). The price is fixed using the area on the registration record. If a later survey finds a different area, the price is not adjusted. Because of that, the contract normally says so expressly — a clause to the effect that the price will not go up or down even if a survey shows a different area. No survey is needed to close, which makes the sale simpler and cheaper, but you carry the risk that the real area is smaller than the record says (and the seller carries the risk that it is larger).
• 実測売買 (sale by surveyed area). The contract states the registered area to set a provisional price, a survey is carried out before the final payment, and any difference between the registered area and the surveyed area is settled at a unit price per square metre written into the contract. If the survey finds less land, the price comes down; if it finds more, the price goes up.

A hypothetical example: land registered at 100 m², contract unit price ¥300,000 per m², and a survey that finds 95 m². Under a 実測売買 with a settlement clause, the price would fall by 5 m² × ¥300,000 = ¥1,500,000. Under a 公簿売買 with a no-adjustment clause, the price stays the same and you have 95 m² of land.

Both are contract arrangements, not a rule written into the registry. Which one applies to your purchase depends on the wording of your contract, so read that clause before signing rather than assuming either default. Which remedies, if any, you would have in a dispute over a shortfall also depends on that wording and the facts — confirm that with a judicial scrivener (司法書士), a lawyer, or the licensed real estate agent handling the deal.

What a survey adds, and when one already exists

Where a parcel has been through a boundary survey, a 地積測量図 (chiseki sokuryōzu) filed by a licensed land and building surveyor (土地家屋調査士) may be on file with the Legal Affairs Bureau, and the registered area may already reflect that survey. A recent one is a much stronger reference than an old registered figure; our boundaries guide explains how to judge how reliable a given filing is. Many parcels, especially older rural land, have no such diagram.

Some areas have also been through a municipal cadastral survey (地籍調査, chiseki chōsa). This is a survey carried out by the municipality under the National Land Survey Act, which investigates and measures owner, lot number, land category, boundary and area parcel by parcel. The results are sent to the Legal Affairs Bureau, the registration record is corrected accordingly, and the resulting cadastral map is kept by the registry as an Article 14 map (不動産登記法第14条第1項の地図). Municipal guidance states that landowners do not bear the cost of the survey itself. Where a 地籍調査 has been completed for the neighbourhood, the registered area is therefore likely to be survey-based — but not every area has had one, so ask the municipality's cadastral survey section (or the seller's agent) whether yours has.

Correcting a wrong registered area

If a survey shows the registered area is wrong, the registry can be corrected through a 地積更正登記 (chiseki kōsei tōki, a land area correction registration), which changes the registered area to match the measured one. Because the application needs a survey and a 地積測量図 prepared for it, it is usually handed to a 土地家屋調査士. It typically involves confirming the boundary with the neighbouring owners, and the Ministry of Justice publishes guidance for the case where a neighbour's owner cannot be found. In a purchase this is normally for the seller (or for the two sides to agree on, in the contract) — raise it before signing rather than after closing.

A practical order to work through this before you sign:

1. Find the parcel and read the registered area. Use our free lot-number lookup to identify the parcel, then order the land registration record for ¥1,500 through Japan Property Research. The area (地積) appears in the land description section of the record. Compare it with the area in the listing and in the draft contract — they should agree, and if they do not, ask why before anything else.
2. Find out which type of sale this is. Ask the agent directly: is the sale 公簿売買 or 実測売買? Then look for the clause in the draft contract. A clause saying the price is not adjusted if a survey shows a different area means 公簿売買; a clause providing for a survey before final payment and settlement at a per-m² unit price means 実測売買.
3. Ask what survey, if any, already exists. Is there a 地積測量図 on file at the Legal Affairs Bureau? How old is it? Has the neighbourhood been through a 地籍調査? A recent survey, or a completed cadastral survey, is a good reason to be comfortable with the registered number; no survey and an old record is a reason to ask for one.
4. Decide whether the risk is acceptable. On a small, flat, clearly fenced suburban plot priced at a few million yen, a 公簿売買 may be a reasonable risk. On a large or high-value plot, on land where you plan to build close to the boundary, or on rural land with no survey on file, ask the seller to commission a survey and convert the deal to 実測売買 — or at least make the survey a condition before final payment.
5. Get the arrangement in the contract, not just in conversation. Whatever you agree — a survey before closing, who pays for it, the unit price used for settlement — needs to be written into the contract. A verbal assurance from an agent that "the area is fine" is not an arrangement.
6. Don't treat the fence as the boundary. What is physically fenced can differ from the registered line and from the measured area; see our boundaries guide for how to check the boundary itself.
7. Budget for professional help where it matters. A survey and, if the registered area is wrong, a correction registration involve a 土地家屋調査士 and cost money; those fees are market-priced and set by the professional, so get a quote rather than relying on a figure from a guide.

What the registration record can and cannot tell you here:

• What it shows reliably: the registered area (地積), the land category (地目) and the ownership and rights history of the parcel. It is the starting point for the question "what does the registry say this plot is?"
• What it does not show: whether the registered area matches what is on the ground. The record states a figure; it does not say how recently or how precisely that figure was measured, and it does not say whether the sale you are looking at is 公簿売買 or 実測売買 — that is in the contract, not the registry.
• How to order it: use our free lot-number lookup to find the parcel, then order the land registration record for ¥1,500 through Japan Property Research, delivered by email. If the parcel also has a building, the building is a separate record at ¥1,500. The official parcel map (公図) can be added for ¥500 (included on Pro and Team plans) and shows the parcel's shape and its neighbours; a shape that looks very different from the area the record states is a prompt to ask more questions.
• What it does not replace: a survey. Japan Property Research retrieves the registration record and the parcel map; it does not measure land or commission a survey. If you need to confirm the physical area, that is a job for a licensed land and building surveyor.

For how the area figure fits into the wider set of pre-purchase checks, see Japan Property Due Diligence Checklist; for how to read the rest of the record, see How To Read A Japanese Property Registration Record. For anything genuinely complicated — a disputed boundary, a large shortfall, or a contract you are being asked to sign quickly — confirm with the Legal Affairs Bureau or a judicial scrivener (司法書士) before you commit.

FAQ

Is the area on the Japanese registration record always accurate? No. It is the area that was registered, and it is only as accurate as the survey behind it. Older land in particular can show a registered area that differs from a modern measurement — 縄伸び when the real area is larger, 縄縮み when it is smaller.

What is the difference between 公簿売買 and 実測売買? In a 公簿売買 the price is based on the registered area and is not adjusted if a survey later finds a different area. In a 実測売買 the area is surveyed before final payment and any difference from the registered area is settled at a unit price stated in the contract.

Which type of sale is normal in Japan? Both are used, and the contract wording decides which applies. Do not assume — look for the clause on whether the price changes if the surveyed area differs, and ask your agent to confirm it in writing.

If the real area is smaller than the registered area, can I get money back? That depends on your contract and the facts. Under a 実測売買 with a settlement clause the price is adjusted by the unit price; under a 公簿売買 with a no-adjustment clause, the contract says it is not. Whether you would have any other remedy is a legal question — put it to a judicial scrivener or lawyer before signing, not after.

Can the registered area be corrected? Yes. A 地積更正登記 (land area correction registration) changes the registered area to match a survey. It normally goes through a land and building surveyor (土地家屋調査士), who prepares the survey and the 地積測量図, and typically involves confirming the boundary with neighbouring owners.

Does a municipal cadastral survey (地籍調査) mean the area is reliable? Where one has been completed for the area, the registration record is corrected using its results, so the registered area is likely to be survey-based. Not every area has had one — ask the municipality or the agent whether yours has.

Does this guide cover building floor area? No — this is about land area. For the area of a building or condo unit, see How To Check Floor Area On A Property In Japan.

Related guides:

• How To Check Land Boundaries In Japan
• How To Read A Japanese Property Registration Record
• How To Check Floor Area On A Property In Japan
• How To Order A Japan Property Registration Record In English
• What Is Touki In Japan?
• Japan Property Due Diligence Checklist

• 法務省：隣の土地の所有者が分からなくてお困りの方へ（分筆や地積更正の登記のとき）— 地積更正の登記、土地家屋調査士への依頼、隣接地所有者への対応 — Ministry of Justice
• 国土交通省：地籍調査の概要（国土調査の概要）— 一筆ごとの所有者・地番・地目・境界・面積の調査、成果の登記所への送付と登記記録の修正、不動産登記法第14条第1項の地図としての備付け — Ministry of Land, Infrastructure, Transport and Tourism
• 国土交通省：地籍調査の概要 参考資料 — 同上（補足資料） — Ministry of Land, Infrastructure, Transport and Tourism
• 千葉市：地籍調査リーフレット — 地籍調査の測量等の費用は土地所有者の負担がないこと — Chiba City
• 和歌山県：地籍調査 Q&A — 地籍調査の内容と費用負担 — Wakayama Prefecture
• 三井住友トラスト不動産：公簿売買（用語集）— 登記簿面積による売買と、面積差を清算しない取引方式 — Sumitomo Mitsui Trust Realty (industry glossary; secondary source)
• 三井住友トラスト不動産：実測売買（用語集）— 契約後・決済前に実測し、契約所定の単価で差額を清算する取引方式 — Sumitomo Mitsui Trust Realty (industry glossary; secondary source)
• 三井住友トラスト不動産：重要事項説明の解説 — 公簿売買の契約に「測量で面積に差異が生じても代金を増減しない」旨の特約を付けるのが一般的であること — Sumitomo Mitsui Trust Realty (secondary source)

A note on scope and verification: when this guide was drafted, the official Japanese government sites could not be opened directly from the drafting environment, so the descriptions above were checked against search-result summaries of these pages rather than read in full on the pages themselves; a human reviewer should re-confirm each against the linked page. The official Ministry of Justice and Ministry of Land, Infrastructure, Transport and Tourism pages above are the basis for the description of the area correction registration and of the municipal cadastral survey. The description of 公簿売買 and 実測売買 reflects standard industry practice as described in the real-estate industry sources listed, not a rule stated in the statute. This guide deliberately does not cite specific Civil Code articles or give a view on what remedies are available when the actual area differs from the registered area under either type of sale — that depends on the contract wording and the facts, and should be put to a judicial scrivener (司法書士) or lawyer. Registration tax and professional fees for a survey or a correction registration are also deliberately not quoted here. Confirm anything that affects a purchase decision with the Legal Affairs Bureau or a qualified professional.