史し上じょうに例れいを見みない

expression, i-adjective

unparalleled in history; unprecedented

A set phrase meaning something has never happened before in recorded history. Often used in formal or emphatic contexts.

• これは史し上じょうに例れいを見みない大だい発はっ見けんだ。

  This is an unparalleled discovery in history.

• その災さい害がいは史し上じょうに例れいを見みない規き模ぼだった。

  The disaster was of an unprecedented scale in history.