How To Check If Japanese Land Is Designated Protected Forest (保安林)

What 保安林 is and who designates it

A 保安林 is a forest designated under the Forest Act to achieve one of eleven public purposes listed in Article 25, paragraph 1: recharging water sources (水源かん養), preventing soil runoff (土砂の流出の防備), preventing landslips (土砂の崩壊の防備), preventing blown sand, defending against wind, flood, tide, drought, snow or fog damage, preventing avalanches or rockfall, fire prevention, fish habitat (魚つき), preserving navigation landmarks, public health (公衆の保健), and preserving the scenic character of famous or historic sites. Article 25 numbers these as eleven items, but item 5 covers six separate hazards and item 6 covers two, so the Forestry Agency and most prefectures describe the result as 17 types of 保安林. You will meet that figure far more often than the statutory eleven.

Two authorities make the designation. The Minister of Agriculture, Forestry and Fisheries designates under Article 25. For privately owned forest (民有林), the Minister's power is limited to the first three purposes and to forest inside an "important watershed" (重要流域). The prefectural governor designates privately owned forest in all other cases, under Article 25-2: purposes one to three outside an important watershed, and purposes four to eleven generally.

The designation takes legal effect through a public notice (告示), not through anything filed at the Legal Affairs Bureau. Under Article 33, the notice states the location of the forest, the purpose of the designation, and the 指定施業要件: the method and the limit for cutting standing trees, plus the method, period and tree species for any replanting required on cut-over land. Article 33, paragraph 2 is explicit that designation and release take effect by that notice.

What you may not do without permission

This is the part that decides whether a parcel suits your plans. Article 34 sets out two separate permission requirements.

• Article 34, paragraph 1: cutting standing trees. In a 保安林 you may not cut standing trees (立木) without the governor's permission. There are nine exceptions, including removal cutting (除伐), cutting required by law, and cutting urgently needed during a fire or a storm or flood disaster. Two of them run through a prior notification to the governor rather than a permission, and both are narrower than they sound. Selective cutting (択伐) under Article 34-2 is limited to forest established by artificial planting (人工植栽に係る森林), so selective cutting in natural forest still needs permission under paragraph 1. Thinning (間伐) under Article 34-3 is open to any 保安林. Both routes require the cutting to conform to the method prescribed in the 指定施業要件 and to stay within the cutting limit it sets, and the governor can order the plan changed if it does not. Item 9 of the exception list defers to Ministry ordinance, and Article 60 of the Enforcement Regulation uses it for ten further cases. Five of those also run through a prior notification, due two weeks before the intended cutting day under Article 60, paragraph 2, and they include urgently removing a tree that is seriously damaging, threatening or obstructing a road, railway, power line or building. Only a few cases, such as cutting fallen or dead trees, need no filing at all.
• Article 34, paragraph 2: everything else, including groundworks. Without the governor's permission you may not cut bamboo, damage standing trees, graze livestock, gather undergrowth, fallen leaves or fallen branches, or excavate earth, stone or tree roots, bring land into cultivation (開墾), or otherwise change the form or quality of the land (その他の土地の形質を変更する行為). The exceptions are narrow, and include minor acts specified by Ministry ordinance and acts urgently needed in a disaster.

Relying on an exception is not the same as having no paperwork. Where you act under the emergency case in paragraph 1, item 7 or paragraph 2, item 4, Article 34, paragraph 9 with Article 66 of the Enforcement Regulation still requires a notification to the governor within 30 days of the day the cutting or other act finished, and failing to file it carries a fine of up to ¥300,000 under Article 210, item 2.

That last phrase is the one a buyer should read twice. Levelling a building platform, cutting into a slope, putting in a driveway or laying foundations all change the form of the land, so on a 保安林 parcel they fall inside Article 34, paragraph 2 and need permission first.

Do not read that permission as a planning consent you apply for and expect to receive. Article 34, paragraph 5 sets the test, and it is narrow: the governor must grant the paragraph 2 permission unless the act is found to impede achievement of the purpose the forest was designated for. A permanent house removes forest cover permanently, and on land designated to recharge a water source or hold a slope together, that is precisely the kind of act the test exists to catch. There is no development-permit route as an alternative either, because Article 10-2 expressly excludes 保安林 from its scope. Converting protected forest to a non-forest use is therefore a question of releasing the designation, and as the next section shows, an owner wanting to build is not among the statutory grounds for release. The practical conclusion for a buyer: treat a 保安林 parcel as not buildable unless the prefecture tells you otherwise in writing, before you pay for it.

The penalties are not nominal

The Forest Act splits the penalties, and the heavier one lands on groundworks rather than on trees.

• Excavating earth, stone or tree roots, bringing land into cultivation, or otherwise changing the form or quality of the land in breach of Article 34, paragraph 2: imprisonment of up to three years or a fine of up to ¥3,000,000 (Article 206, item 4).
• Cutting standing trees in a 保安林 in breach of Article 34, paragraph 1: a fine of up to ¥1,500,000 (Article 207, item 1).
• Cutting bamboo, damaging standing trees, grazing livestock, or gathering undergrowth, fallen leaves or fallen branches in breach of Article 34, paragraph 2: a fine of up to ¥1,500,000 (Article 207, item 2).

There is also a pre-designation stage worth knowing about. Where a forest has been publicly notified as 保安林予定森林 (forest earmarked for designation), the governor may prohibit cutting, excavation, cultivation and land-form changes for a period of up to 90 days under Article 31, and breaching that prohibition carries a fine of up to ¥1,000,000 under Article 208, item 3.

Release is not a buyer's lever

It is tempting to assume a designation can be lifted on request. The statute gives only two grounds. Under Article 26-2, the governor must release a privately owned 保安林 when the reason for the designation has ceased to exist, and may release it when a need arises for reasons of public interest (公益上の理由). Article 26 does the same for designations made by the Minister. Article 27 lets a local government head with an interest, or a person with a direct interest in the land, apply in writing for designation or release.

So an application is possible, but the grounds are the ones the statute names. Wanting to build a house, or wanting the land to be worth more, is not among them. Treat a seller's or agent's suggestion that the designation "can be removed later" as a claim to be checked with the prefecture in writing before you sign, not as a reason to pay more.

保安林 and the ordinary forest development permit are different regimes

Forest that is not designated 保安林 is not unregulated, but the rules are much lighter, and the two are easy to confuse.

Under Article 10-2, a development permit from the governor is needed for 開発行為 in privately owned forest covered by a regional forest plan (地域森林計画), and the article expressly excludes 保安林 from its scope. Crucially, the permit bites only above a size threshold set by cabinet order. The Forest Act Enforcement Order, Article 2-3, sets those thresholds: 0.5 hectares for works to install solar power equipment, 1 hectare plus a road width of 3 metres for works purely to build or improve a road, and 1 hectare for everything else. Developing without the required permit carries imprisonment of up to three years or a fine of up to ¥3,000,000 under Article 206, item 1.

The practical consequence is sharp. On ordinary planned forest, a house plot of a few hundred square metres sits well under the 1 hectare threshold, so the Article 10-2 permit usually does not apply at all. On 保安林 there is no area threshold: Article 34 applies to the parcel whatever its size.

Falling below the development threshold is not the same as being unregulated. For privately owned forest covered by a regional forest plan, Article 10-8 separately requires the forest owner to file a cutting and reforestation notification (伐採及び伐採後の造林の届出書) with the municipal mayor before cutting standing trees, and that duty carries no general area threshold. The Enforcement Regulation, Article 9, requires the filing between 90 days and 30 days before cutting starts, and cutting without it carries a fine of up to ¥1,000,000 under Article 208, item 1. The filings do not stop there: Article 10-8, paragraph 2, with Article 14-2 of the Enforcement Regulation, requires a report on the state of the forest within 30 days of the day cutting finishes and, where replanting follows, a further report within 30 days of the day that replanting finishes, thinning aside. Failing to report or reporting falsely carries a fine of up to ¥300,000 under Article 210, item 1. The second report is keyed to the day replanting ends, so where the notification states the land will be converted to a non-forest use and no replanting is planned, it does not arise. Confirm which applies with the municipality. The Article 10-8 duty does not apply on 保安林, because the stricter Article 34 permission applies there instead. Article 10-8 also lists eleven exceptions of its own, among them cutting carried out to execute a development already permitted under Article 10-2, removal cutting (除伐), and cutting urgently needed in a disaster. The eleventh of those defers to Ministry ordinance, and Article 14 of the Enforcement Regulation uses it for several everyday cases: cutting fallen, dead or badly damaged trees, and cutting trees that are seriously damaging, threatening or obstructing a road, railway, power line or building where the area cut is markedly small. The Forestry Agency sets the figures for that last one by notice, so check the current limits with the municipality rather than assuming a hazardous tree always needs 30 days of lead time. So a project that already holds the development permit does not additionally owe the notification. Note that the disaster case among those exceptions waives only the advance filing: under Article 10-8, paragraph 3 and Article 15 of the Enforcement Regulation, an owner who cuts urgently in a fire, storm or flood must still file a cutting notification with the municipal mayor within 30 days of finishing, and omitting it carries a fine of up to ¥300,000 under Article 210, item 2.

So the accurate summary is this: on ordinary planned forest a small plot usually needs a notification to the municipality but no development permit, while on 保安林 it needs the governor's permission whatever its size. "It is only forest land, and it is tiny" is not a safe assumption in either case.

Buying forest triggers a notification of its own

Article 10-7-2 requires anyone who newly becomes the owner of privately owned forest land covered by a regional forest plan to notify the municipal mayor, unless they have already filed under Article 23, paragraph 1 of the National Land Use Planning Act. The Enforcement Regulation, Article 7, sets the deadline at 90 days from the day you become the owner, and failing to file, or filing a false one, carries a non-criminal fine (過料) of up to ¥100,000 under Article 213.

This duty applies whether or not the parcel is 保安林. Where it is, the mayor passes the notification on to the prefectural governor. Treat it as part of closing on any forest purchase, not as an optional formality.

A clue in the tax bill

Under the Local Tax Act, Article 348, paragraph 2, item 7, land that is 保安林 is exempt from fixed asset tax (固定資産税), apart from a narrow carve-out for land used for certain recreational forest facilities specified by cabinet order. If a seller's tax documents show no fixed asset tax on a forest parcel, that is worth asking about. It is a hint rather than proof, since other exemptions exist, but it points in a useful direction.

Here is how to check a specific parcel before you commit.

1. Get the lot number (地番). Forest designation records are organised by parcel, so you need the lot number, not the postal address. Rural forest frequently has no address at all. Our free lot number lookup and the guide to finding a lot number cover this step.
2. Do not treat the registered land category as the answer. 保安林 is one of the 23 land categories in the Real Property Registration Rules, so a record can say 保安林, and that is a strong signal. But the designation is made under the Forest Act and takes effect by public notice, and it is the prefecture's forest administration, not the register, that records it authoritatively. Protected land is very often registered simply as 山林. A register that does not say 保安林 proves nothing either way. See How To Check The Land Category Of A Japanese Property for what the label does and does not mean.
3. Ask the prefecture to show you the 保安林台帳. This is the authoritative check and it is the step most buyers skip. Article 39-2 requires the governor to prepare and keep a protected forest register, and provides that a request to inspect it may not be refused without just cause. Contact the prefecture's forestry division (林務課 or 森林整備課, names vary) or the local 農林事務所 with the municipality, district and lot number, and ask whether the parcel is designated, for which purpose, and what the 指定施業要件 are. Ask separately whether any Article 34 permission has ever been granted or refused on the parcel, and whether an Article 31 prohibition is running on it or on adjoining forest earmarked for designation. Neither is recorded in the register, so a request to see the 保安林台帳 alone will not surface them.
4. Use map data as a first screen only. Many prefectures publish a forest GIS viewer showing protected forest boundaries, and the Ministry of Land, Infrastructure, Transport and Tourism publishes a national 保安林 dataset through its National Land Numerical Information service. These are quick ways to see whether a parcel is anywhere near designated forest, but they are periodic snapshots with map-scale boundaries, so confirm against the register before relying on them.
5. Ask for it in writing, where the duty actually applies. When a licensed agent (宅地建物取引業者) is party to the sale or brokers it, restrictions under Article 34, paragraphs 1 and 2 are among the matters that must be covered in the important matters explanation (重要事項説明): the Enforcement Order of the Building Lots and Buildings Transaction Business Act, Article 3, paragraph 1, item 46 names Forest Act Articles 10-2(1), 10-11-6, 31 and 34(1) and (2). Ask for that section specifically. Two limits matter on forest, and both cut against relying on this step. The duty attaches only to 宅地 or a building, and under Article 2, item 1 of that Act 宅地 means land provided as a building site, plus other land inside a designated use district (用途地域), excluding public facility land. Rural forest that is neither a building site nor inside a use district falls outside the Act, so no agent owes you the explanation however the sale is arranged, which describes most 保安林. Where the land does qualify, note that a sale between two individuals still carries the duty if a licensed agent brokers it: what carries none is a genuinely direct sale with no agent, common on municipal akiya bank listings. Assume the check is yours and confirm with the prefecture either way.
6. Ask about your actual plan, not about the designation in the abstract. The useful question to the prefecture is not "is this 保安林" alone but "if it is, would permission under Article 34, paragraph 2 be needed for what I intend to do, and is it realistically granted here". Levelling, access roads and foundations are the acts to describe.
7. Plan for the notifications you will owe after closing. On privately owned forest covered by a regional forest plan, becoming the owner triggers an Article 10-7-2 notification to the municipal mayor within 90 days, and that one applies whether or not the parcel is 保安林. Cutting is the opposite: if the parcel is not 保安林, cutting generally needs an Article 10-8 notification to the municipality 90 to 30 days beforehand, subject to the exceptions in that article. If it is 保安林, Article 10-8 does not apply at all and you need the governor's permission under Article 34 instead. Never treat a municipal notification as a substitute for that permission. If you ever cut or carry out groundworks on the emergency exception instead of a permission, file the Article 34, paragraph 9 notification with the governor within 30 days of finishing, under Article 66 of the Enforcement Regulation. The ordinary-forest equivalent runs to the municipality instead: Article 10-8, paragraph 3 with Article 15 of the Enforcement Regulation, also within 30 days. On 保安林 the obligation does not end at the permission either. Once the cutting is finished, Article 34, paragraph 8, with Article 65 of the Enforcement Regulation, requires the holder of the Article 34(1) permission to notify the governor within 30 days, and to notify the forest owner within 30 days as well if the holder is not the owner. Omitting that notification carries a fine of up to ¥300,000 under Article 210, item 3. Then Article 34-4 puts a duty on the forest owner to replant the cut-over land by the method, within the period and with the tree species set in the 指定施業要件, and that duty falls on the owner even when somebody else did the cutting, unless the owner had just cause for not knowing of it or a replanting order has already been issued. If the owner misses the period or plants the wrong way or species, Article 38, paragraph 4 lets the governor order the planting done. Ask the municipality and the prefecture which route applies before you cut anything. And if you do cut under an Article 10-8 notification, reports follow under Article 10-8, paragraph 2 and Article 14-2 of the Enforcement Regulation: one within 30 days of finishing the cutting, and a second within 30 days of finishing the replanting where replanting is part of the plan. If you are clearing to build and the notification says so, only the first arises.
8. Put the answer in the contract. If the purchase depends on being able to build, make the contract conditional on written confirmation from the prefecture, with a deadline. Verbal reassurance from a seller is not a defence to a prosecution under Article 206 or 207.

The most common mistake is reading a cheap 山林 listing as ordinary forest and assuming that a small plot escapes regulation because it is well under a hectare. That reasoning holds for the Article 10-2 development permit and fails completely for 保安林, where no area threshold applies. The second mistake is assuming the previous owner's clearing work established that the land can be cleared: unlawful work carries liability, and the restoration orders under Article 38 can be directed at putting the land back.

What the property registration record can and cannot tell you here:

• What it shows reliably: the lot number, the registered land category (which may or may not say 保安林), the registered area, the current owner, and any mortgages, seizures or other registered rights, all as of the date of the record. For a forest parcel, confirming who actually owns it matters more than usual, since inherited rural forest is often still registered to a deceased ancestor.
• What it does not show: whether the parcel is designated 保安林, which purpose it was designated for, or what the 指定施業要件 permit. None of that lives in the property register. It lives in the designation notice (告示) and the prefecture's 保安林台帳, which under Article 74 of the Enforcement Regulation records the designation date and notice number, the location and area, the purpose, the 指定施業要件, the condition of the forest at the time of designation, and a map showing the boundary and the lot numbers.
• What even the forest register does not show: whether a permission under Article 34 has ever been granted or refused for the parcel, and whether an Article 31 prohibition is in force. Those are separate administrative records, not entries in the register, and an Article 31 order applies to 保安林予定森林 that is not yet designated, so it would not appear in a register kept per designated forest. Ask the prefecture for both by name rather than assuming the register covers them.
• How to order the record: use the free lot number lookup to identify the parcel, then order the land registration record for ¥1,500. If there is a building on the land, order the building record too, since land and buildings are registered separately. Both are delivered by email and saved to your account. Our guide to ordering registration records in English explains the process.

The registration record is the right first step because it gives you the lot number, the ownership position and the encumbrances you need before approaching the prefecture. It is not a substitute for the forest register. Run both, and put the result in your due diligence checklist alongside road frontage, boundaries and zoning.

Where a parcel carries a designation and your plans depend on changing the land, confirm the position with the prefecture's forestry division and take advice from a judicial scrivener (司法書士) or a land and house investigator (土地家屋調査士) before you sign.

FAQ

What does 保安林 mean? 保安林 (hoanrin) means "protected forest". It is forest designated by the Minister of Agriculture, Forestry and Fisheries or by a prefectural governor under Article 25 or Article 25-2 of the Forest Act, to serve one of eleven public purposes such as protecting a water source, preventing soil runoff or landslips, or preventing rockfall.

Can I build a house on 保安林 land in Japan? Usually not, and you should plan on the answer being no. Changing the form or quality of the land, which covers levelling, excavation and foundations, requires the governor's permission under Article 34, paragraph 2, and cutting the standing trees requires permission under paragraph 1. Article 34, paragraph 5 says the governor must grant the paragraph 2 permission unless the act would impede achievement of the designation purpose, and a permanent house generally does on forest designated to protect a water source or a slope. There is no development-permit alternative, since Article 10-2 excludes 保安林, and the designation cannot be released merely because an owner wants to build. Get the prefecture's written view on your specific plan before you buy.

How do I check whether a parcel is 保安林? Get the lot number, then ask the prefecture's forestry division to check the protected forest register (保安林台帳). Under Article 39-2 of the Forest Act the prefecture keeps that register and may not refuse an inspection request without just cause. Prefectural forest GIS viewers and the national protected forest dataset are useful for a first look but are not authoritative.

Does the property registration record show whether land is 保安林? Not reliably. 保安林 is one of the 23 registered land categories, so some records do say it, but the designation is made under the Forest Act and takes effect by public notice. Designated land is often registered as 山林. Use the register to get the lot number and ownership, then check with the prefecture.

Can a 保安林 designation be removed? Only on the grounds the statute gives. Under Article 26-2 the governor must release the designation when the reason for it has ceased to exist, and may release it where a need arises for reasons of public interest. A person with a direct interest can apply under Article 27. Wanting to develop the land is not itself a ground, so treat any assurance that the designation can simply be lifted as something to confirm with the prefecture in writing.

What happens if trees are cut or land is cleared without permission? Cutting standing trees in breach of Article 34, paragraph 1 carries a fine of up to ¥1,500,000. Excavating or otherwise changing the form of the land in breach of Article 34, paragraph 2 is treated more seriously: imprisonment of up to three years or a fine of up to ¥3,000,000. Restoration orders are also possible.

Is forest that is not 保安林 unrestricted? No. Two separate rules apply. A governor's development permit is needed under Article 10-2 only above the scale set by the Enforcement Order, Article 2-3: 0.5 hectares for solar installations, 1 hectare plus 3 metres of road width for road works, and 1 hectare otherwise, so a typical house plot falls below that. But as a general rule Article 10-8 requires a cutting and reforestation notification to the municipal mayor before cutting, with no area threshold, filed between 90 and 30 days beforehand, and cutting without it carries a fine of up to ¥1,000,000. That article lists eleven exceptions, including cutting carried out under a development already permitted under Article 10-2, removal cutting and emergency cutting, so the permit and the notification are not simply cumulative. Buying the land also triggers a new-owner notification under Article 10-7-2 within 90 days. 保安林 has no area threshold for the Article 34 permission.

Is 保安林 land taxed? Land that is 保安林 is exempt from fixed asset tax under Article 348, paragraph 2, item 7 of the Local Tax Act, apart from a narrow carve-out for certain recreational forest facilities. An unexpectedly absent tax bill on a forest parcel is worth asking about.

Related guides:

• How To Check The Land Category Of A Japanese Property
• How To Check If A Japanese Property Is Farmland
• How To Check If A Japanese Property Is Rebuildable
• How To Check Zoning And Hazard Maps In Japan
• How To Check Land Boundaries In Japan
• How To Find Akiya For Sale In Japan
• Japan Property Due Diligence Checklist

• e-Gov: Forest Act (森林法), Act No. 249 of 1951, current text. Digital Agency e-Gov law database, official. Articles 10-2 (development permit), 25 and 25-2 (designation), 26-2 and 27 (release and applications), 31 (forest earmarked for designation), 33 (public notice and effect), 34 (restrictions), 39-2 (protected forest register), 206, 207 and 208 (penalties).
• e-Gov: Order for Enforcement of the Forest Act (森林法施行令), Cabinet Order No. 276 of 1951, Article 2-3. Digital Agency e-Gov law database, official. Development scale thresholds: 0.5 ha for solar, 1 ha otherwise.
• e-Gov: Local Tax Act (地方税法), Article 348, paragraph 2, item 7. Digital Agency e-Gov law database, official. Fixed asset tax exemption for protected forest land.
• e-Gov: Building Lots and Buildings Transaction Business Act (宅地建物取引業法), Articles 2 and 35. Digital Agency e-Gov law database, official. Definition of 宅地 and the scope of the important matters explanation.
• e-Gov: Order for Enforcement of the Building Lots and Buildings Transaction Business Act (宅地建物取引業法施行令), Article 3, paragraph 1, item 46. Digital Agency e-Gov law database, official. Forest Act restrictions that must be covered in the important matters explanation.
• e-Gov: Regulation for Enforcement of the Forest Act (森林法施行規則), Articles 7, 9, 14, 14-2, 15, 60, 65, 66 and 74. Digital Agency e-Gov law database, official. Deadlines for the new-owner notification, the cutting and reforestation notification, the post-cutting reports and the completion notice on a permitted 保安林 cut, the notification after emergency work, the cases exempt from the Article 10-8 notification, and what the 保安林台帳 records.
• Forestry Agency: The protected forest system (保安林制度). Forestry Agency, Ministry of Agriculture, Forestry and Fisheries, official.
• Forestry Agency: The forest land development permit system (林地開発許可制度). Forestry Agency, Ministry of Agriculture, Forestry and Fisheries, official.
• MLIT: National Land Numerical Information, protected forest data (国土数値情報 保安林データ). Ministry of Land, Infrastructure, Transport and Tourism, official.