原げん史し時じ代だい

noun

protohistory

Academic term for the transitional period between prehistory and recorded history, when contemporary written sources from other cultures exist but local written records are absent or scarce.

• 原げん史し時じ代だいの遺い跡せきからは、文も字じ資し料りょうはほとんど見みつかっていない。

  Hardly any written materials have been found at protohistoric sites.