Many rental contracts include a clause prohibiting "subletting" (matagashi, also called tentai). At the same time, having friends or family stay over for a short period is generally treated as part of everyday life. These two things seem similar but mean different things, so it's important to understand the contract correctly. Here we'll take a neutral look at why subletting is prohibited and how it differs from having guests stay. Rules for room-sharing and adding a cohabitant are covered in more detail in a separate article.
- Subletting (matagashi/tentai) means renting the room out to a third party other than the leaseholder — receiving payment for it, or letting them make the room their primary residence.
- Many rental contracts prohibit subletting without the landlord's consent.
- Friends or family staying over for a short period are generally treated as distinct from subletting.
- Adding a cohabitant, or renting out the room for payment, can constitute a breach of contract.
- If you're unsure, it's best not to decide on your own — consult the management company or landlord in advance.
What counts as subletting (matagashi/tentai)
Subletting refers to renting out all or part of the room to a third party other than the person who signed the lease, letting them use it as their primary residence or receiving payment for it. Typical examples include taking in an unspecified number of paying guests as in minpaku (private lodging), or the leaseholder living elsewhere while continuing to rent the room out to a third party. Many rental contracts do not permit this without the landlord's consent.
Why many contracts prohibit subletting
The main reason subletting is prohibited is that having someone the landlord doesn't know about living in the unit can create problems for building management, security, and relationships with neighbors. Since a rental contract is entered into based on trust in the leaseholder personally, subletting to a third party without the landlord's consent is considered to undermine that contractual trust, and contracts generally specify that it can be grounds for termination.
The difference from friends or family staying over briefly
Friends or family staying over for a few days for travel or an errand is generally treated as part of everyday life and is not considered subletting. On the other hand, if you accept payment for putting someone up, or if someone other than the leaseholder ends up living there as their base of living over a long period, this can start to be seen as akin to subletting. Where the line for "everyday life" falls depends on the contract and the situation, so if you're unsure, it's best to check in advance.
The difference from adding a cohabitant
If you want to live with a friend or partner long-term, this is treated not as subletting but as "adding a cohabitant," and many contracts require advance notification and the landlord's consent. Adding a cohabitant without permission can also be treated as a breach of contract. The specific procedure for adding a cohabitant is covered in more detail in a separate article on room-sharing and adding a cohabitant. Be careful, too, that a case where the leaseholder moves out and only the remaining cohabitant continues living there can effectively be regarded as subletting to a person other than the leaseholder.
How to consult when you're unsure
Situations can come up where you're not sure whether it's okay to have a friend stay over, or whether you should register them as a cohabitant. In such cases, it's safer not to decide on your own — be upfront with the management company or landlord about the situation and confirm with them. Consulting in advance and completing any necessary procedures lets you avoid the risk of being told later that you've breached the contract. Understanding the rules correctly and preparing ahead of time is the shortest path to living with peace of mind.
Frequently asked questions
Does a friend staying over for a few days count as subletting?
This is generally treated as distinct, falling within everyday life, and is not considered subletting. However, a long-term or paid stay is a different situation.
What happens if subletting is discovered?
Contracts generally specify that it can be grounds for termination. To avoid trouble, it's important to consult the landlord in advance.
What should I do if I want to live with a partner long-term?
This is treated as adding a cohabitant rather than subletting, and many contracts require advance notification and the landlord's consent.
Summary
While subletting (matagashi/tentai) is prohibited under most rental contracts, friends or family staying over briefly is generally treated separately as part of everyday life. If the line feels unclear, don't decide on your own — consult the landlord or management company in advance, complete any necessary procedures, and live with peace of mind.