Translation guide
Describes something that has reached full development, status, or qualification. In Japanese, this is expressed through adjectives, verbs, or set phrases depending on whether you mean 'fully qualified', 'complete', or 'fully developed'.
To describe someone who has completed training and is now a full member of a profession or group.
Literally 'one person's portion', this is the most common way to say someone is a fully fledged professional or adult. It implies they are competent and independent.
彼は一人前の医者になった。
He became a fully fledged doctor.
一人前の大人として扱ってほしい。
I want to be treated as a fully fledged adult.
Means 'full-scale' or 'genuine'. Used for things or activities that are done in earnest, not just as a hobby or trial.
彼は本格的な料理人だ。
He is a fully fledged chef.
Means 'formal' or 'official'. Used when someone has officially obtained a status or title.
彼女は正式な会員になった。
She became a fully fledged member.
To describe something that has reached its final, complete form.
Means 'complete' or 'perfect'. A general-purpose adjective for something fully developed.
これは完全な解決策ではない。
This is not a fully fledged solution.
Also used for things that are full-scale or fully implemented, not just a prototype or small version.
会社は本格的なオンラインサービスを開始した。
The company launched a fully fledged online service.
Means 'matured' or 'ripened'. Used for systems, markets, or technologies that have fully developed over time.
これは成熟した市場だ。
This is a fully fledged market.
The literal meaning of a young bird that has grown its flight feathers and is ready to fly.
Literally 'feathers have fully grown'. Used in biological or poetic contexts.
ひなは羽が生えそろって、まもなく飛び立った。
The chick, now fully fledged, soon flew away.
一人前 is mainly for people who have reached a level of competence or independence. 本格的 is for things or activities that are full-scale or genuine, not half-hearted. For a person, 一人前 implies skill and maturity; 本格的 implies they are serious/professional in their approach.
Do not translate 'fully fledged' literally as 完全に羽の生えた unless you are talking about birds. For people and things, use the expressions above.