N3 · Structured courses

Sei De: Because Of (Blame)

Learn せいで for blaming a negative outcome on something — "it's because of...". 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: Learn せいで for blaming a negative outcome on something — "it's because of...".
  • Form and connection: [Plain form] せいで
  • Nuance in real use: This intermediate pattern adds sophistication to your Japanese.

Form and connection

[Plain form] せいで

Core Explanation

Learn せいで for blaming a negative outcome on something — "it's because of...".

Cultural Note

This intermediate pattern adds sophistication to your Japanese.

Practical examples

I was late because of the rain.
Because I overslept, I couldn't catch the train.
I couldn't sleep at all because of the noise.

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[Plain form] せいで
2. Explain the meaning of the first example.
Show answerI was late because of the rain.
3. Rewrite the final example using this lesson pattern.
Show answer騒音そうおんのせいで全然ぜんぜん眠ねむれなかった。 ([Plain form] せいで)

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