原げん始し時じ代だい

noun, noun which may take the genitive case particle 'no'

primitive times; prehistoric era

Refers to the earliest period of human history before written records, or metaphorically to a very early, undeveloped stage of something.

• 原げん始し時じ代だいの人ひと々びとは洞どう窟くつに住すんでいた。