noun, noun which may take the genitive case particle 'no'
expiration; maturity; completion of term
Used for the end of a fixed period, such as a contract, insurance policy, prison sentence, or financial instrument. Often appears in compounds like 満期日 (maturity date) or 満期になる (to mature/expire).
When the insurance matures, I'll consider whether to renew it.
The maturity date of the time deposit is the 15th of next month.
This insurance policy matures in five years.
The fixed deposit has finally reached maturity.
I received the insurance payout upon maturity.
期日 refers to a specific fixed date by which something must happen, while 満期 refers to the end of an entire term or period, not just a single date.
任期 means the fixed term of an office or position (e.g. a politician's term), while 満期 refers to the expiration point of a contract, policy, or sentence, not an elected role.
Compound of 満, “full,” and 期, “term or appointed period,” referring to the point at which a prescribed term has been completed.