An expression meaning that nobody has reached or achieved something before; used for unprecedented territories, discoveries, or accomplishments.
その科学者は前人未到の研究分野を開拓したと評価された。
The scientist was praised for pioneering a research field that had never been explored before.
前人未到の記録を打ち立てるには、並外れた努力が必要だ。
To set a record that nobody has ever set before requires extraordinary effort.
この作品は表現手法が前人未到で、多くの批評家を驚かせた。
This work's method of expression was unprecedented, surprising many critics.