Jisho

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Expressions (phrases, clauses, etc.), Adverb (fukushi)
1. before very long; soon; someday; one of these days; sooner or laterUsually written using kana alone
Expressions (phrases, clauses, etc.), Adverb (fukushi)
2. of the previously mentioned; of that number; among them; among othersUsually written using kana alone
Other forms
其の内 【そのうち】

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