What rental property can serve as a dormitory for technical-intern and specified-skilled workers? Room area, fire and the company dormitory checks

In short: When using a rental property as a dormitory for technical-intern or specified-skilled foreign workers, what matters on the property side is three things: room area, fire, and use zone. Room area follows the residence-system side — technical interns need a bedroom of at least 4.5 m² per person (excluding alcove and closet), and Specified Skilled Worker (i) is in principle a room of at least 7.5 m² per person. Dormitories and apartments are classified under item (5)-ro of Appended Table 1 of the Order for Enforcement of the Fire Service Act, require fire equipment by total floor area, etc., and under Appended Table 2 of the Building Standards Act cannot be built in an exclusive industrial zone. We go as far as providing information on the property's area, fire and use zone; the dormitory rules and the notification to the Labour Standards Inspection Office plus labor/social insurance are for a labor and social security attorney, the residence status and the accepting organization/support plan for an administrative scrivener, and the fire-equipment design for a fire-equipment technician and the governing fire station — each under a separate contract.

This is written for the HR/general-affairs staff of small and medium accepting organizations (manufacturing, construction, care, food service) that accept specified-skilled/technical-intern workers, and for owners who search for dormitory rental properties. We organize the property-side requirements of converting an ordinary rental into a dormitory, from the Labour Standards Act, the Ordinance on Dormitories Attached to Businesses, the Order for Enforcement of the Fire Service Act, the Building Standards Act and the residence-system operation guidelines. We handle information on the property's area, use and fire situation, and do not design dormitory rules, notifications, residence status or fire equipment. Each of those areas is referred separately, under its own contract.

How many m² per person must a property used as a foreign-worker dormitory secure?

Area takes effect on the residence-system side. The technical-intern operation guideline sets a bedroom at 4.5 m² or more per sleeping person (excluding alcove and closet), and the Specified Skilled Worker (i) support guideline sets a room at 7.5 m² or more per person in principle. The dormitory under the Labour Standards Act (the Ordinance on Dormitories Attached to Businesses) is a separate track, setting a floor of 2.5 m² per person for a Type 1 dormitory bedroom.

Three numbers appear because the bases differ. Technical interns require, as the securing of appropriate lodging, a bedroom of at least 4.5 m²/person, individual storage for personal belongings, a window with an effective daylighting area of at least one-seventh of the room area, and heating. Specified Skilled Worker (i) requires, under the mandatory support "securing of housing," a room of at least 7.5 m²/person in principle (for shared rooms, room area ÷ occupants ≥ 7.5 m²); where a person continues to live in the same company dormitory, etc., after moving from technical intern, a bedroom of at least 4.5 m²/person suffices. Separately, if the lodging is a "dormitory attached to a business" under the Labour Standards Act, the equipment standards of the Ordinance on Dormitories Attached to Businesses (Type 1: bedroom at least 2.5 m²/person, up to 16 per room, individual storage) apply on top.

System / basis	Area guideline (per person)	Also required
Technical intern (guideline)	Bedroom 4.5 m²+ (excluding alcove/closet)	Individual storage, daylighting window (1/7+), heating
Specified Skilled Worker (i) (guideline)	Room 7.5 m²+ (continuing dormitory: bedroom 4.5 m²+)	Housing securing is mandatory support
Ordinance on Dormitories (Type 1)	Bedroom 2.5 m²+, up to 16/room	Individual storage, daylighting window (1/7+)

In practice, if you propose a property as a dormitory, matching the widest standard (the Specified-Skilled room 7.5 m²) lets it be used across systems. Whether the room area, storage and daylighting for the number accepted can be secured is organized on the property side by us, and residence-system feasibility is referred to an administrative scrivener and dormitory rules/labor to a labor and social security attorney.

When turning an ordinary rental apartment into a dormitory, what does fire law require?

Dormitories, boarding houses and apartments are classified under item (5)-ro of Appended Table 1 of the Order for Enforcement of the Fire Service Act. An automatic fire alarm system, extinguishers, guidance lights, etc., apply according to this classification and the total floor area/number of floors, and changing the compartments or occupancy changes the required equipment. The fire view differs between making a whole condominium/rental (apartment) a dormitory and using one dwelling unit for several people.

Article 17 of the Fire Service Act and the Order require fire equipment per fire-object classification (Appended Table 1). For a (5)-ro dormitory/apartment, an automatic fire alarm system, extinguishers, guidance lights and in some cases escape devices are required according to total floor area, etc. In an existing building, whether these can be retrofitted and whether the receiver/wiring route can be taken is the dividing line in selection. Where the whole building's use is changed to a dormitory, separately consider the need for a change-of-use confirmation application (change-of-use area over 200 m²).

Check item	Point
Fire classification	Dormitory/boarding house/apartment is Appended Table 1 item (5)-ro
Fire equipment	Automatic fire alarm, extinguishers, guidance lights, etc. (varies with classification/area/floors)
Evacuation above 2F	The technical-intern guideline requires 2+ stairs to the outside for bedrooms above the 2nd floor (1 for fewer than 15 occupants)
Decision-maker	The governing fire authority (fire station/prevention section) decides individually. Consult before fixing the property

The specifics and cost of the required fire equipment change with the building and classification, so we treat them as [unverified], with design by a fire-equipment technician and confirmation by the governing fire station as a premise. We organize the current state (existing fire equipment, expected classification) as property information.

Do the use zone and the building's use (apartment/dormitory) change which properties can be rented?

They do. Under Appended Table 2 of the Building Standards Act, apartments, dormitories and boarding houses are listed in item (い)3 and can be built even in the Category 1 low-rise exclusive residential zone, but cannot be built in the exclusive industrial zone (item (わ)3). When searching for dormitory-suited properties near an industrial estate, this is where you can trip up.

A building used as a dormitory has the Building Standards Act use of "dormitory" or "apartment." Appended Table 2 sets buildable buildings by use zone (Article 48); apartments/dormitories/boarding houses can be built across a wide range from the Category 1 low-rise exclusive residential zone to the quasi-industrial zone, while in the exclusive industrial zone dwellings, apartments and dormitories are all listed as buildings that cannot be built. If a cheap property near a factory is in an exclusive industrial zone, it may be unusable as a dormitory, so the use zone must be checked first. When converting an existing office/shop into a dormitory, a confirmation application is required if the change-of-use floor area exceeds 200 m² (Building Standards Act Article 6(1), Article 87).

Check item	Basis / point
Use zone	Appended Table 2 item (い)3 = apartment/dormitory/boarding house. Item (わ)3 = not allowed in the exclusive industrial zone
Building use	Usable as a dormitory/apartment (need for change of use from office/shop)
Change-of-use confirmation	Required if the change-of-use floor area exceeds 200 m² (Art. 6(1), Art. 87)
Lighting	Lighting of habitable rooms (Building Standards Act Art. 28). Calculation by an architect

In the lease, how should occupancy and subletting be decided?

Where the accepting organization leases a property and houses interns/specified-skilled workers, it often amounts to subletting legally, so the occupancy and whether subletting is allowed must be stated in the lease. Housing several people or subletting without the lessor's consent can be a seed for breach and termination.

For a company-leased dormitory, the contracting parties are the accepting organization (lessee) and the lessor, and interns/specified-skilled workers are in the position of sub-lessees. In the contract, clarify "occupancy," "use as an employee dormitory leased by a corporation," "consent to subletting," "restoration" and "settlement on move-out," and confirm them in the important-matters explanation (Real Estate Brokerage Act Article 35) and the Article 37 document. Whether rent deducted from wages is within actual cost and reasonable is a wage-deduction/labor-agreement matter in the domain of a labor and social security attorney. Whether dormitory rules must be drawn up and notified to the Labour Standards Inspection Office is set out in When preparing a dormitory for foreign technical interns or specified-skilled workers, is notification of dormitory rules required?.

Contract point	Key point
Parties	Accepting organization (lessee) and lessor. Residents are sub-lessees
Occupancy / subletting	State occupancy and consent to subletting (use as an employee dormitory)
Rent deduction	Actual-cost range and reasonableness of wage deduction are in the labor attorney's domain
Important-matters explanation	Use, restoration, costs (Real Estate Brokerage Act Art. 35, Art. 37 document)

What should you confirm with a labor and social security attorney and an administrative scrivener before deciding on a property?

The order is "pick a candidate property → confirm feasibility of area, use zone and fire → align on the accepting organization/residence-system side's standards → design dormitory rules, notification and labor → contract." If you contract and then find insufficient area or that the use zone bars a dormitory, the backtrack is large.

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Because the technical-intern bedroom 4.5 m² and the specified-skilled room 7.5 m² are residence-system standards, align with an administrative scrivener on whether the number accepted and the layout meet them. Where the lodging is a "dormitory attached to a business," drawing up and notifying dormitory rules (Labour Standards Act Article 96-2; the Form 1 of Article 3-2 of the Ordinance on Dormitories Attached to Businesses, to the head of the governing Labour Standards Inspection Office), labor insurance and social insurance are in the domain of a labor and social security attorney. Note that the technical-intern system is scheduled to transition to the Employment for Skill Development system, so the positioning of lodging standards may change; we premise confirming the latest operation at the time of application (the post-transition details are [unverified] in this article).

Stage	Who	Content
① Pick a candidate property	Us	Provide information on use zone, current use, room area, fire situation
② Feasibility check	Us + architect/fire	Change of use (over 200 m²), lighting, expected fire classification
③ Align on standards	Administrative scrivener + us	Whether the number accepted and room area meet the residence-system standard
④ Dormitory rules/labor	Labor and social security attorney	Draw up/notify dormitory rules, labor/social insurance, wage deduction (separate contract)
⑤ Fire equipment	Fire-equipment technician / governing fire	Design/install the required fire equipment (separate contract)
⑥ Contract	Us	Lease stating company lease/subletting/occupancy, important-matters explanation

We handle the investigation of the property's use, area and fire situation, the important-matters explanation, price and terms, brokerage and the lease contract. The drawing up of dormitory rules and the notification to the Labour Standards Inspection Office, labor/social insurance and wage-deduction design are for a labor and social security attorney; the residence status and the accepting organization/support plan for an administrative scrivener; the fire-equipment design/installation for a fire-equipment technician and the governing fire station; and the change-of-use confirmation accompanying a change of use for an architect — each an independent business entity, separate from us. Where roles overlap, we clarify before the contract who handles what, and you contract with each separately. Each professional is engaged directly. We neither receive nor pay any referral fee or introduction commission. Consultations are free.

FAQ

Q. How many m² per person does a foreign-worker dormitory need?
A. It differs by system. The technical-intern operation guideline sets a bedroom at 4.5 m²+ per sleeping person (excluding alcove/closet), and the Specified Skilled Worker (i) support guideline sets a room at 7.5 m²+ per person in principle (shared rooms: room area ÷ occupants). The Ordinance on Dormitories Attached to Businesses (Type 1) is a separate floor of 2.5 m²/person for the bedroom. To use across systems, matching the widest standard is practically safer. Confirm feasibility with an administrative scrivener and a labor and social security attorney.

Q. If I turn an ordinary rental apartment into a dormitory, is extra fire equipment required?
A. Dormitories/apartments are classified under item (5)-ro of Appended Table 1 of the Order for Enforcement of the Fire Service Act, and an automatic fire alarm, extinguishers, guidance lights, etc., are required by total floor area/number of floors. Changing compartments or occupancy changes the equipment. Whether it can be retrofitted in an existing building is the dividing line. Because the specifics and cost vary with the building (treated as [unverified] here), consult a fire-equipment technician for design and the governing fire station for confirmation.

Q. Can I make a cheap property near an industrial estate a dormitory?
A. It depends on the use zone. Apartments/dormitories/boarding houses can be built even in the Category 1 low-rise exclusive residential zone under Appended Table 2 item (い)3, but cannot be built in the exclusive industrial zone (item (わ)3). A cheap property near a factory in an exclusive industrial zone may be unusable as a dormitory, so the use zone must be checked first. A change of use from office/shop over 200 m² also needs a confirmation application.

Q. When the company leases and houses interns, what should the contract decide?
A. Leasing and housing by the accepting organization often amounts to subletting, so state occupancy, use as an employee dormitory, consent to subletting and restoration in the lease. Housing several people without the lessor's consent can be a breach. The actual-cost range/reasonableness of rent deducted from wages, and the notification of dormitory rules, are in the domain of a labor and social security attorney.

Sources (primary information)

• e-Gov Law Search "Labour Standards Act" (Act No. 49 of 1947; Article 96 = equipment/safety and health of a dormitory attached to a business; Article 96-2 = notification to the head of the governing Labour Standards Inspection Office when establishing/relocating/altering a dormitory. Accessed 8 Oct 2026)
• e-Gov Law Search "Ordinance on Dormitories Attached to Businesses" (Ministry of Labour Ordinance No. 7 of 1947; Article 19 = Type 1 dormitory bedroom at least 2.5 m²/person excluding alcove/closet, up to 16/room, individual storage, window with daylighting area of at least one-seventh of the room area; Article 3-2 = the Article 96-2 notification (Form 1 with drawings, to the head of the governing Labour Standards Inspection Office). Accessed 8 Oct 2026)
• MHLW "Technical Intern Training System Operation Guideline" (securing appropriate lodging = bedroom at least 4.5 m²/sleeping person (excluding alcove/closet), individual storage, window with daylighting area of at least one-seventh of the room area, heating, and 2+ stairs to the outside for bedrooms above the 2nd floor (1 for fewer than 15 occupants). Accessed 8 Oct 2026)
• Immigration Services Agency "Operation Guideline on Support for Specified Skilled Worker (i)" (securing housing is mandatory support; a room at least 7.5 m²/person in principle, and for continuing to live in the same company dormitory, etc., after technical intern, a bedroom at least 4.5 m²/person suffices. Accessed 8 Oct 2026)
• e-Gov Law Search "Order for Enforcement of the Fire Service Act" (Cabinet Order No. 37 of 1961; Appended Table 1 item (5)-ro = dormitory/boarding house/apartment; under Fire Service Act Article 17 and the Order, automatic fire alarm, extinguishers, guidance lights, etc., by classification/total floor area. Accessed 8 Oct 2026)
• e-Gov Law Search "Building Standards Act" (Act No. 201 of 1950; Article 48 and Appended Table 2 item (い)3 = apartment/dormitory/boarding house buildable even in the Category 1 low-rise exclusive residential zone, item (わ)3 = not buildable in the exclusive industrial zone; Article 6(1) and Article 87 = change-of-use confirmation if over 200 m². Accessed 8 Oct 2026)

• The specific feasibility of bedroom/room area and fire equipment varies with the number accepted, the building, the system (technical intern/specified skilled) and the governing fire authority/municipality's operation. This article does not assert the required fire equipment or cost; such matters are treated as [unverified], on the premise of confirmation by an administrative scrivener, a labor and social security attorney, a fire-equipment technician and the governing fire station.
• The technical-intern system is scheduled to transition to the Employment for Skill Development system, and the positioning of lodging standards may change. This article is organized on the premise of the current operation guideline; post-transition details are [unverified]. Confirm the latest published content at the time of application.
• This article is general information, not an individual legal or tax judgment. Dormitory rules, the notification to the Labour Standards Inspection Office and labor/social insurance are for a labor and social security attorney; the residence status and accepting organization/support plan for an administrative scrivener; the fire-equipment design for a fire-equipment technician; the change-of-use confirmation for an architect; registration for a judicial scrivener; and accounting/tax for a tax accountant.
• The investigation of the property's use, area and fire situation, the important-matters explanation, brokerage and the lease contract are handled by Yotsuba Real Estate Co., Ltd. (real estate brokerage); the various professionals, the fire-equipment technician and the architect contract with you separately as independent business entities. There is no exchange of referral fees or introduction commissions. See Investment & commercial real estate and Commercial property consultation.

About the author

Joji Uramatsu — Licensed Real Estate Transaction Specialist (Tokyo Governor registration No. 293544) and Administrative Scrivener (registration No. 25087022). Representative Director of Yotsuba Real Estate Co., Ltd. (real estate brokerage, Tokyo Governor (1) No. 113304) / Head of Yotsuba Administrative Scrivener Office. Kohinata, Bunkyo-ku, Tokyo, about 5 minutes' walk from Myogadani Station. For rental properties used as foreign-worker dormitories, the room area, use zone and fire situation are confirmed before the contract, with the dormitory rules, residence status and fire-equipment procedures split by role among the respective professionals. See the author page for the full profile.