原げん史し時じ代だいげんしじだいじ字FuriganaMeanings1nounprotohistoryAcademic 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
