〜たるもの (~taru mono) — anyone who is a ~ (must…)

A very stiff, formal way to state the ideal — how anyone in a responsible role must be.

Formula (सूत्र ढाँचा)

N + たるもの（は）、… べきだ／なければならない

Grammar rule (व्याकरण नियम र परिभाषा)

When to use it

First day at a new company, the department head gives a speech: 'Once you're a working adult, punctuality and greetings are a must.' — 「社会人たるもの…」
He is not scolding any one person — it is the rule for anyone in that role.
It is stiff, the voice of speeches and essays.

Meaning

「〜たるもの」= the lecture 'anyone in such a position must be like this'.
What follows is a 'must' sentence — 〜べきだ・〜なければならない・〜て当然だ.

How to attach

Straight after a noun for a responsible or honoured role (教師・医者・親・リーダー), optionally adding 「は」
There is also an N₁ たる N₂ shape, as in 「首相たる者」, with the same meaning.

Versus what you know

N2「〜として」(教師として) is a plain 'as a ~'.
The previous 「ともあろう」criticises an unworthy thing someone has already done; 「たるもの」states a general ideal for everyone, with no particular incident.

Watch out

Never an event like 'what he did yesterday' after it.

Examples (उदाहरणहरू)

社会人たるもの、時間を守るのは当然だ。

しゃかいじんたるもの、じかんをまもるのはとうぜんだ。

For anyone who is a working adult, being on time is a given.

How it is built (कसरी बन्यो) 社会人 = working adult (responsible to society) → attach 「たるもの」 directly = once you are such a person → then the ideal: 時間を守るのは当然だ = being on time is a given.

介護士たるもの、利用者の気持ちを第一に考えるべきだ。

かいごしたるもの、りようしゃのきもちをだいいちにかんがえるべきだ。

Anyone who is a care worker should put the feelings of the people in their care first.

How it is built (कसरी बन्यो) 介護士 = care worker (a job that looks after other people's lives) → 「たるもの」 → then 'must': 利用者の気持ちを第一に考えるべきだ = should think first of the feelings of the people they care for.

リーダーたるもの、まず自分が手本を見せなければならない。

リーダーたるもの、まずじぶんがてほんをみせなければならない。

Anyone who is a leader must first set the example themselves.

How it is built (कसरी बन्यो) リーダー = leader (responsible for the team) → 「たるもの」 = once you're a leader → then 'must do': 手本を見せなければならない = must set an example.

Knowledge check (मिनी ज्ञान जाँच)

Question: 1/3

「プロ＿＿＿、どんなに体調が悪くても言い訳はしないものだ。」— fill the blank.

💡 Hint: A role + the ideal 'this is how one should be'.