A comprehensive breakdown of the differences between "security deposit," "key money," "guarantee money," and "non-refundable deductions" required in Japanese rental contracts, with a focus on regional customs in the Kanto and Kansai areas. Real estate professionals explain the legal nature, refund conditions, and move-out settlement rules for each term, providing clarity for foreign residents who often find these terms confusing.

Reviewed by: Nobuyuki MoriPresident, M-Assets Co., Ltd. / Licensed Real Estate Transaction Specialist (Miyagi #018212)
## Why Security Deposit and Key Money Refund Disputes Are Widespread When tenants move out after ending a rental agreement, disputes over security deposit refunds with landlords and management companies are common. The reason is that the treatment of security deposits and key money is legally complex, and misunderstandings easily arise between tenants and landlords. As a basic point, a security deposit is money that a tenant should receive back when a contract ends, and it has the nature of a "deposited sum." Key money, on the other hand, is gratitude money that belongs to the landlord and is not subject to refunds. However, in practice, some properties are contracted with this distinction left unclear, and many tenants who receive explanations like "key money will not be returned" upon move-out question the legitimacy of such claims.
Japan's "key money" is a unique custom that's often puzzling to foreigners. This guide covers the historical background of key money, current market rates, regional differences, how to find properties without key money, and negotiation strategies for waiving it.
Many people wonder what "key money" is in rental deposits and why it must be paid. From the mechanics of key money to its historical background, regional differences, and practical negotiation strategies to reduce it to zero—real estate professionals explain everything.
Japanese rental contracts feature uniquely structured initial fees—security deposits, key money, guarantee money, and non-refundable deductions—that are rarely seen elsewhere in the world. Because each term has different legal implications and refund rules, failing to understand them before signing a contract can result in unexpected financial losses at move-out. Adding to the confusion, Kanto-region and Kansai-region customs differ significantly, and terms like "guarantee money" may carry different meanings depending on the region.
A security deposit is money paid to the landlord at the time of signing to serve as collateral for unpaid rent or damage to the property. For the first time in 2020, Japan's Civil Code reform (Article 622-2) formally codified this concept with the following definition:
"Security Deposit: Money paid by the tenant to the landlord to secure payment of rent and other obligations arising from the rental agreement, regardless of the name by which it is designated."
Under the Civil Code, after the rental contract ends and the property is returned, the landlord must refund any portion of the security deposit remaining after deducting unpaid rent and restoration to original condition costs. While the law does not specify an exact return deadline, court precedent interprets this as "within a reasonable period after return of the property" (typically one to two months).
Security deposits typically range from zero to two months' rent. In the Kanto region, one month's rent is standard; in the Kansai region, these amounts are often called "guarantee money" instead (discussed below).
Key money is a non-refundable payment made to the landlord as a "thank you" for renting the property. Historically, this practice originated in the post-WWII housing shortage as tenants' way of expressing gratitude for being allowed to rent.
The Civil Code contains no specific provision for key money; it is simply an established commercial practice. While Japan's Supreme Court has recognized key money as a valid "part of the consideration for the rental contract," excessively high amounts may violate the Consumer Contract Act.
| Region | Key Money Range |
|---|---|
| Greater Tokyo Area (Tokyo, Kanagawa) | 1–2 months' rent |
| Kansai Region (Osaka, Kyoto) | 0–1 month's rent (typically lower due to guarantee money system) |
| Regional Cities | Many properties charge no key money |
In recent years, more landlords offer properties with no key money, and it may be possible to negotiate a reduction in key money in some cases.
In the Kansai region (Osaka, Kyoto, Hyogo), "guarantee money" is often used in place of separate security deposits and key money. Guarantee money is a lump-sum collateral payment made at contract signing; at move-out, the landlord deducts "non-refundable deductions" before returning the remainder to the tenant.
Non-refundable deductions are amounts unconditionally subtracted from the guarantee money at move-out. Like key money, these are non-refundable; however, unlike key money (paid upfront), they are deducted at the time of move-out.
Example of Typical Guarantee Money and Non-Refundable Deduction Structure
Japan's Supreme Court (ruling of March 24, 2011) established that non-refundable deduction clauses are valid if the following conditions are met:
Excessively high non-refundable deductions may be deemed invalid as violations of the Consumer Contract Act (Article 10).
After move-out, settlement proceeds in the following order:
The "Restoration to Original Condition: Disputes and Guidelines" publication clearly states that normal wear and tear and age-related deterioration are the landlord's responsibility. If any charges fall outside these guidelines, you have the right to request an itemized breakdown in writing. For the latest guidance incorporating the 2020 Civil Code reform, see the updated restoration guideline. If you have concerns, contact your local consumer affairs center, bar association, or Sumai-ru Dial (0570-016-100) for consultation.
If an agent describes a payment as a "deposit," always verify in the contract whether it is classified as a "security deposit," "guarantee money," or "key money." The same word "deposit" can mean vastly different things in terms of how much is refundable.
Landlords typically transfer refunds only to Japanese bank accounts. If you plan to return to your home country, arrange to keep a Japanese bank account open until the refund is received, or provide the account details of a family member or friend in Japan.
If you have questions during the move-out settlement process, your local government's international resident hotline and international exchange associations often provide free interpretation services. Preparing copies of your contract, inspection report, and repair estimate before consulting will help discussions proceed more smoothly.
Although "security deposits," "key money," "guarantee money," and "non-refundable deductions" may sound similar, each carries different legal implications and refund potential. The Kanto region typically uses the security deposit and key money system, while the Kansai region typically uses the guarantee money and non-refundable deduction system—verify which applies to your property before signing. At move-out, tenants have the right to demand a settlement calculated according to Ministry of Land, Infrastructure, Transport and Tourism guidelines; always request an itemized breakdown in writing if you question any charges.
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