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~Kai ga Aru: It's Worth / Rewarding

Learn kai ga aru for "it was worth doing" — effort that paid off. 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 kai ga aru for "it was worth doing" — effort that paid off.
  • Form and connection: [Verb ta-form/Nounの] 甲斐かいがある
  • Nuance in real use: 甲斐 is one of Japanese's warmest value-judgment words — it's not just about results but "was it worth it." 頑張った甲斐があった (your effort was worth it) is the best affirmation Japanese people give each other.

Form and connection

[Verb ta-form/Nounの] 甲斐かいがある

Core Explanation

Learn kai ga aru for "it was worth doing" — effort that paid off.

Cultural Note

甲斐 is one of Japanese's warmest value-judgment words — it's not just about results but "was it worth it." 頑張った甲斐があった (your effort was worth it) is the best affirmation Japanese people give each other.

Practical examples

My hard work paid off — I passed.
Even with all this suffering, it's not worth it.
Life is worth living.

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[Verb ta-form/Nounの] 甲斐かいがある
2. Explain the meaning of the first example.
Show answerMy hard work paid off — I passed.
3. Rewrite the final example using this lesson pattern.
Show answer生いきている甲斐かいがある。 ([Verb ta-form/Nounの] 甲斐かいがある)

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