How to say "expiration" in Japanese

• 満了まんりょうCommon
  noun, suru verb, transitive verb, intransitive verbUse for a contract, term, or fixed period coming to its end; expiration as the natural completion of a set duration rather than a loss of validity.
• 満期まんきCommon
  no-adjectiveExpiration of a set term, especially the maturity of an investment; also used for serving one's full time, such as completing a sentence.
• 老廃ろうはいCommon
  noun, suru verb, intransitive verbA marginal match: it means deterioration or wearing out through age, so it is seldom the word you want for an expiration date or deadline.
• 失効しっこうCommon
  noun, suru verb, intransitive verbExpiration in the sense of lapsing: a right, license, or agreement ceasing to be valid or effective, rather than a set period simply reaching its end.

Use 満了 for a fixed period or contract simply coming to an end, 満期 for a set term maturing (especially investments), 失効 for something losing validity, and 老廃 not for deadlines but for age-related deterioration.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 満了まんりょうexpiration
• 満期まんきexpiration (of a term)
• 老廃ろうはいdeterioration (due to age)
• 失効しっこうlapse
• 呼気こきexhaled air