N5 · Structured courses

~n Desu: Explanatory and Background

Master んです for explaining situations, providing context, or expressing realization. This lesson combines form, context, examples, common mistakes, and practice so you can use the pattern in real communication.

12 minNihongo Hub Editorial TeamPublished 2026-06-06Updated 2026-06-06

Learning objectives

  • Lesson goals: Master んです for explaining situations, providing context, or expressing realization.
  • Form and connection: [句子Plain form] んです
  • Nuance in real use: んです is one of Japanese's most nuanced structures — it draws an invisible circle around a sentence, signaling "there's context here." It doesn't explain outright — it invites the listener to ask or understand the hidden story.

Form and connection

[句子Plain form] んです

Core Explanation

Master んです for explaining situations, providing context, or expressing realization.

Cultural Note

んです is one of Japanese's most nuanced structures — it draws an invisible circle around a sentence, signaling "there's context here." It doesn't explain outright — it invites the listener to ask or understand the hidden story.

Practical examples

Why were you late?
I have a headache (that's why).
I have an exam tomorrow (so I can't go out).
Oh, I see! (realization)

Common pitfalls

Build the base form before adding the pattern

Complete the required conjugation first. Do not keep polite and plain endings at the same time.

Match politeness to the situation

The examples are reliable starting points; relationships and context can still change the most natural wording.

Practice and answers

1. Write the connection formula for this lesson.
Show answer[句子Plain form] んです
2. Explain the meaning of the first example.
Show answerWhy were you late?
3. Rewrite the final example using this lesson pattern.
Show answerそうだったんですか! ([句子Plain form] んです)

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