たる【たるに】

The grammar pattern たる is a classical/literary attributive form of the copula だ/である, used to express "being (something)" or "as a (something)." It appears in formal, written, or rhetorical contexts and carries a sense of dignity, authority, or expectation tied to one's role or status. It is most commonly found in the pattern Noun + たる + Noun, where it functions as a modifier meaning "one who is (Noun)" or "befitting of (Noun)."

Noun + たる + Noun (Attributive use)

This is the most common pattern. たる modifies the following noun, expressing the idea that someone or something holds a particular status or role and should act accordingly.

The nuance here is not simply descriptive – it implies that the status carries certain expectations, responsibilities, or standards. Saying いしゃ医者たるもの者 doesn't just mean "a person who is a doctor" but rather "a person who bears the title and responsibility of being a doctor."

Noun + たるに足る / たるにふさわしい

Another common pattern uses たるに足る (worthy of being ~) or たるにふさわしい (befitting of being ~), emphasizing qualification or worthiness.

Usage notes

• たる is restricted to formal, literary, or stiff speech. It is common in essays, speeches, editorials, proverbs, and set phrases, but would sound unnatural in casual conversation.
• It attaches to nouns only (typically abstract or status-related nouns like きょうし教師, しどうしゃ指導者, こくみん国民, おや親, しんし紳士).
• The related adverbial form is たるもの (one who is ~), which often appears with expressions of obligation such as べきだ or なければならない.
• Do not confuse this with the classical たり (the continuative/adverbial form of the same copula), as in どうどう堂々たるたいど態度 (a dignified attitude). In such cases, たる directly modifies a noun as a fixed expression derived from classical Japanese.