Lock replacement fees at move-in typically range from ¥10,000–¥20,000, but responsibility for payment depends on contract terms. A real estate expert explains the procedures and considerations for upgrading to high-security dimple keys or smart locks, as well as requirements for restoration to original condition at move-out.
Reviewed by: Nobuyuki MoriPresident, M-Assets Co., Ltd. / Licensed Real Estate Transaction Specialist (Miyagi #018212)
When moving into a rental property, lock replacement is an important procedure to prevent security risks if the previous resident had duplicate keys made. However, regarding the question "whether the tenant or landlord bears the lock replacement cost," there are many cases where national guidelines and actual practice differ, and many tenants lose out without realizing it.
Who should bear the cost of key replacement at move-in? This guide explains how to negotiate for upgraded security locks such as dimple keys or electronic locks, along with typical costs.
Key replacement is an essential security procedure when moving into a rental property. However, without understanding cost responsibility and market rates, you may face unfair charges. This article provides a comprehensive explanation of costs by key type, legal interpretations, and negotiation strategies.
Fire insurance is virtually mandatory when signing a rental lease. Many people enroll in insurance designated by the management company without much thought, but choosing your own policy can save ¥10,000–20,000 annually. We explain the differences between tenant liability insurance, personal liability insurance, and household goods insurance, plus the procedures you need to follow.
Security measures for rental properties start before you even choose a property. From key checkpoints when selecting a property, to essential knowledge about lock replacement upon move-in, to cost-effective security product tips—real estate professionals explain with real-world examples.
The Ministry of Land, Infrastructure, Transport and Tourism's "Disputes and Guidelines Regarding Restoration to Original Condition" states that lock replacement costs are in principle the landlord's responsibility. This is based on the view that "from a security perspective, lock replacement itself is included in the landlord's equipment maintenance obligations."
However, if the rental agreement specifically states "lock replacement costs are the tenant's responsibility," that special provision may be deemed valid. Be sure to confirm before signing the contract.
Lock replacement costs vary significantly depending on the type of lock.
Disk Cylinder Lock (Older Type) Cost: approximately ¥8,000–¥15,000. An older lock type commonly found in older properties. Security is low and is prone to picking attacks.
Rotary Disk Cylinder Lock / U9 Key Cost: approximately ¥10,000–¥18,000. Widely used in current rental properties, with improved pick resistance.
High-Security Dimple Key Cost: approximately ¥15,000–¥30,000. The key surface has numerous dimples, providing very high pick resistance and high-security specifications.
Smart Lock (Electronic Lock) Cost: ¥20,000–¥50,000 or more. The latest type that unlocks via passcode, smartphone, or IC card. There is no risk of losing the key and duplication is difficult.
If you want to upgrade to high-security dimple keys or smart locks for improved security, follow these steps.
Step 1: Prior Application to Management Company or Landlord Unauthorized lock replacement violates the contract. Always obtain written permission. The application should specify "the type and manufacturer of the replacement lock," "the contractor name," and "move-out handling."
Step 2: Confirm Cost Responsibility Upgrade costs are basically the tenant's responsibility. However, if the landlord recognizes the security improvement benefits, cost sharing may be possible.
Step 3: Agree in Advance on Move-Out Handling Decide in advance whether you will return to the original lock at move-out or remove the smart lock. If you leave it behind, you typically cannot charge the landlord for the cost.
When Management Company Only Permits Specified Contractors Some management companies only allow "specified contractors" to prevent installation errors. If you're considering hiring your own contractor, be sure to confirm in advance.
Important considerations when installing an aftermarket smart lock (such as Qrio Lock, SwitchBot Lock, or Sesame 5).
Double-Sided Tape Adhesive Type This type attaches to the thumb turn portion without modifying the existing lock. Easy restoration makes it suitable for rentals. Be sure to keep a physical key on hand as backup in case of battery drain lockout.
Type That Replaces the Existing Lock Higher security, but requires modification of the lock mechanism, so landlord permission is essential. There will also be a cost to return to the original lock at move-out.
Confirm and record the following at move-in.
Cost Responsibility Losing a key is considered tenant negligence, and replacement costs are the tenant's responsibility. The cost range is the same as the lock types mentioned above.
In Case of Emergency Contact the management company's emergency line (or landlord) to borrow a master key or have a locksmith arranged. Emergency unlock service during late night or holidays typically incurs an additional charge (approximately ¥5,000–¥10,000).
Security Measures Since there is a possibility that a lost key could be found by a third party, consider lock replacement. Even if the reason is justified, costs are the tenant's responsibility.
While lock replacement costs for rental housing are in principle the landlord's responsibility, this depends on contract terms. Confirming cost responsibility before signing and having it specified in writing is the first step in preventing disputes. Upgrading to high-security dimple keys or smart locks is possible, but obtaining management company approval and agreeing in advance on move-out handling are important.
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