たるもの / たる

The grammar pattern たる (and its extended form たるもの) is a classical and literary expression that means "one who is," "someone in the position of," or "as befitting." It is used to describe what is expected or appropriate for someone of a particular status, role, or identity. It carries a strong sense of duty, propriety, or moral expectation.

This pattern derives from the classical copula たり, with たる being its attributive (連体形) form. In modern Japanese, it survives in formal, written, or rhetorical contexts.

たるもの – "one who is ~" / "anyone who is ~"

たるもの is used to highlight a person's role or status and then state what is expected of them. It often pairs with expressions of obligation such as べきだ, なければならない, or てはならない.

The nuance is prescriptive – it tells you what someone should or should not do given their position.

たる – attributive modifier

たる can also function as a modifier directly before a noun, meaning "worthy of being ~" or "befitting ~." This usage is highly literary.

Key points

• たるもの is almost always used with nouns referring to people or roles (teacher, parent, leader, samurai, etc.).
• The sentence typically continues with a statement about what is expected, required, or forbidden for someone of that standing.
• This pattern is formal and literary. It appears in speeches, essays, proverbs, and dramatic contexts – not in casual conversation.
• It is distinct from the たる used in certain set expressions with たる adjectives (堂々たる, 悠々たる), though both share the same classical origin.