However, roughly it can be said that classifying the periods into (the primitive period), ancient times, the medieval period, the early-modern times, modern times, and the contemporary period is widely accepted in the researching of history.
しかしながら、一応のところ、（原始・）古代・中世・近世・近代（・現代(時代区分)）とする時代区分法が歴史研究では広く受け入れられている。