Jisho

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Expressions (phrases, clauses, etc.), Noun
1. a long time ago; long agoSee also とっくの昔
Other forms
疾うの昔 【とうのむかし】当の昔 【とうのむかし】遠の昔 【とうのむかし】
Notes
当の昔: Irregular kanji usage. 遠の昔: Irregular kanji usage.

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