Definition of Lease Agreements

Plain-language explanation

Article 601 of the Civil Code defines what legally counts as a "lease" (賃貸借) contract in Japan. A lease is formed when one party (the lessor) promises to let the other party (the lessee) use and profit from a particular thing, and the lessee in turn promises to pay rent and to return the item when the contract ends. In short, three elements must be present: a promise to allow use/benefit, a promise to pay rent, and a promise to return the item at termination.

This provision is the foundational rule underlying all lease relationships in Japan — whether it's an office lease, a residential apartment rental, a store lease, or renting equipment, vehicles, or machinery. Even if a contract doesn't spell out every detail, as long as these three elements are satisfied, courts will treat it as a lease and apply the Civil Code's lease rules (and, for real estate, the Land and Building Lease Act). Conversely, if there's no obligation to return the specific item (e.g., consumable goods handed over permanently), the arrangement is likely a different contract type, such as a gift or a loan for consumption (消費貸借), not a lease. This distinction matters for determining which legal rules — and protections — apply.

日本語での解説

Common scenarios

• ▸Leasing office space or retail storefronts for a business
• ▸Renting residential apartments to employees or as corporate housing
• ▸Equipment or machinery rental agreements for construction or manufacturing
• ▸Vehicle leasing arrangements for company fleets
• ▸Determining whether a contract with a supplier is a lease versus a loan-for-consumption or sale