LEARN + JAPANESE / Note 169 JLPT N4

The One Who Is (のは〜だ)

の, the nominalizer you already know, wraps a whole clause into “the one who,” and paired with は〜だ at the end, it singles out exactly who or what the description points to, “the one who does X is Y.”

In Real Life
お酒を飲むのは wraps “the one who drinks alcohol” into a single noun phrase acting as the topic, with だ/です at the end naming exactly who fits it. This flips the normal order, putting the description first and the identity last, which throws extra emphasis onto whoever or whatever answers it.
In Real Life
This pattern works just as well with a place, a time, or an abstract need as the answer, not only a person, 住んでいるのは東京, “the place I live is Tokyo,” 必要なのはコミュニケーション, “what’s needed is communication,” always structured as [description] のは [answer] です.
In Real Life
Turned into a question by swapping the answer for a question word, のは〜ですか asks the listener to fill in exactly who or what fits the description, a natural way to ask “which one was it” once the description itself is already clear.

Vocabulary

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