How to say "maturity" in Japanese

• 成熟せいじゅくJLPT N1approx.Common
  noun, suru verb, intransitive verbCovers maturity in the ordinary sense: the physical, mental, or emotional maturity of a person or other living thing, and the ripeness of fruit. Typical context: discussing whether someone has matured emotionally.
  進すすんで責任せきにんを取とるということは成熟せいじゅくの印しるしである。↗

  Willingness to take responsibility is a sign of maturity.
• 満期まんきCommon
  no-adjectiveNot personal maturity at all: use for an investment reaching maturity, the expiration of a term, or a sentence or period of service being served in full. Financial and legal contexts.
• 円熟えんじゅくCommon
  noun, suru verb, intransitive verbMaturity as mellow, rounded fullness — the polish and depth that come with age and long experience, said of character, artistry, or skill rather than of simple physical growth.
  これはターナーの円熟えんじゅく期きの作品さくひんです。↗

  This is a work from Turner's mature period.
• 丸みまるみCommon
  nounAt heart this means roundness — a smooth, curved shape. Figuratively it can suggest a mellow, softened quality, but it is seldom the word you want for maturity itself; think roundness first.

Use 成熟 for maturity of people or living things in general, 満期 for the maturity of investments or terms, 円熟 for mellow refinement gained with age, and seldom 「丸み」, which really means roundness.

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

• 成熟せいじゅくmaturity
• 満期まんきexpiration (of a term)
• 円熟えんじゅくripeness
• 老熟ろうじゅくmaturity
• 熟れうれmaturity
• いい年いいとしmature age
• 大人気おとなげadultness
• 成熟度せいじゅくど(degree of) maturity
• 丸みまるみmellowness