成人(せいじん)

せいじん
noun
adult, coming of age
formallegalpersonsociety
1. adult
A person who has reached the age of majority.
成人(せいじん)向(む)けの映画(えいが)だ。
This is a movie for adults.
お酒(さけ)は成人(せいじん)しか買(か)えない。
Only adults can buy alcohol.
成人(せいじん)の数(かず)は年々(ねんねん)減(へ)っている。
The number of adults is decreasing year by year.
2. coming of age
The process or event of reaching adulthood.
成人(せいじん)式(しき)に参加(さんか)した。
I attended the coming-of-age ceremony.
日本(にほん)では十八歳(じゅうはっさい)で成人(せいじん)になる。
In Japan, you become an adult at 18.
成人(せいじん)の日(ひ)には、多(おお)くの若者(わかもの)が着物(きもの)を着(き)て写真(しゃしん)を撮(と)る。
On Coming of Age Day, many young people wear kimono and take photos.

成人(せいじん) refers to adults and the process of becoming an adult.

Cultural note

成人(せいじん)の日(ひ) (Coming of Age Day) is a national holiday in Japan held on the second Monday of January. Young people turning 20 that school year attend ceremonies, often in traditional clothing. The legal age of adulthood fell to 18 in 2022, but most municipalities kept the ceremony at 20, often renamed 二十歳(はたち)の集(つど)い.

Common collocations

Similar words

Related Words

Related: 大人(おとな) (adult (general))
Antonym: 未成年(みせいねん) (minor)
Compare: 成年(せいねん) (age of majority)
general
Added 2026.1.12 15:42 · Revised 2026.10.2 10:44
03000/03378_seijin