What it means
にとどまらず means “not limited to” or “extending beyond.” It presents the preceding noun as a boundary that is surpassed, often followed by a second area, group, or consequence that is also included. The expression is common in formal writing, news reports, and speeches, and it often appears in the pattern Xにとどまらず、Yにも…。The surrounding sentence can be made familiar or polite independently of this expression.
Usage note
にとどまらず emphasizes expansion beyond a stated boundary, whereas に限らず more generally means that something is not restricted to one category. Do not treat にとどまらず as an inherently polite ending; the register is determined by the rest of the sentence.
How to use it
その影響は国内にとどまらず、海外にも及びました。
That impact extended beyond the country to overseas as well.
その影響は国内にとどまらず、海外にも及んだ。
That impact extended beyond the country to overseas as well.
Example sentences
この図書館の改修計画は、建物の耐震化にとどまらず、地域の学習環境全体を見直す契機となった。
This library renovation plan became an opportunity to review not only the building's earthquake resistance but also the entire learning environment of the community.
その発明は医療分野にとどまらず、農業や宇宙開発にも新たな可能性をもたらした。
That invention brought new possibilities not only to the medical field but also to agriculture and space development.