Rules for room-sharing or adding a housemate

Once life settles down after arriving in Japan, you may start thinking about room-sharing with a friend, or bringing family over to live together. However, most lease contracts are based on the resident(s) declared at signing, and adding someone to live there without permission may be treated as a breach of contract. If you want to add a housemate, it’s important to consult the management company in advance and go through the necessary procedure.

How a lease contract treats residents

In a lease contract, you declare the number of people living there and their relationship to you at signing, and screening and contract terms are decided based on that. In most cases, having someone other than the declared resident(s) live there for an extended period is considered use beyond what the contract anticipated. This isn’t a rule unique to Japanese leases so much as a basic principle of honoring the terms of the contract. Since the resident information you declare at signing is also the basis for screening and setting the rent, it’s important to make sure it doesn’t diverge from your actual living situation.

Why unauthorized cohabitation is a problem

Adding a housemate without permission means someone the landlord or management company isn’t aware of is using the property, which can blur responsibility if trouble occurs. It’s also a concern because the guarantor company’s screening is based on the resident(s) declared at signing, so adding a housemate changes the scope of risk that was originally assumed. For these reasons, many contracts treat adding an unauthorized housemate as a breach of contract.

How to go about asking to add a housemate

If you have a reason to want to add a housemate, the basic approach is to consult the management company first, share information about the person, and get their consent. The earlier you raise it, the easier it is to plan out the necessary steps. Sometimes verbal approval isn’t enough and written confirmation is required, so follow the guidance you’re given.

What’s involved in additional screening or a contract change

Adding a housemate may involve a tenant screening for the new person moving in. Depending on the result, you may need to change the contract terms or review the guarantor company’s agreement. You may also be asked to submit additional documents, so it’s a good idea to allow plenty of time in your schedule. Since the time this takes varies by property and management company, start the conversation early if you have a planned move-in date for your housemate.

Room-sharing-oriented properties: another option

If you’re already planning to live with a friend, another option is to look for a property or share house designed for room-sharing from the start. These properties have contract terms built around multiple residents, so you won’t need to worry about the procedure for adding a housemate later. Thinking about your future living style at the apartment-hunting stage leads to a smoother contract process.

FAQ

Do I need to report it even for a temporary stay with a friend?

Even for a temporary stay, if someone other than the resident(s) declared in the contract will be staying for an extended period, it’s reassuring to consult the management company in advance.

Does adding a housemate change the rent or contract terms?

It depends on the property and contract. Depending on the result of the additional screening, the contract terms may need to be revised.

Can I search for a place with room-sharing in mind from the start?

Yes. Including room-sharing-friendly properties or share houses in your search criteria makes it easier to avoid a contract change later.

Summary

Adding a roommate or housemate generally requires advance notice and consent under most lease contracts. Unauthorized cohabitation tends to cause trouble, so if you have a reason to add a housemate, consult the management company early and go through the necessary screening and contract changes.