N3 · Structured courses

~to Iu Koto Da: That Means / I Heard That

Learn to iu koto da for summarizing ("that means") and hearsay ("I heard that"). 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 to iu koto da for summarizing ("that means") and hearsay ("I heard that").
  • Form and connection: [Plain form] ということだ
  • Nuance in real use: ということだ is an important relay station in Japanese information flow — it can mark either the source of information (hearsay) or its meaning (summary). In this expression, Japanese packages "source" and "meaning" together.

Form and connection

[Plain form] ということだ

Core Explanation

Learn to iu koto da for summarizing ("that means") and hearsay ("I heard that").

Cultural Note

ということだ is an important relay station in Japanese information flow — it can mark either the source of information (hearsay) or its meaning (summary). In this expression, Japanese packages "source" and "meaning" together.

Practical examples

He's quitting next month — that means he's leaving the company.
According to the news, a typhoon is coming tomorrow.
Since she's not coming, let's begin.

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] ということだ
2. Explain the meaning of the first example.
Show answerHe's quitting next month — that means he's leaving the company.
3. Rewrite the final example using this lesson pattern.
Show answer彼女かのじょが来こないということだから、始はじめましょう。 ([Plain form] ということだ)

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