Especially from the perspective of sculpture art history, the Heian period's former half was occasionally called the Jogan period (or the Konin period), but it does not make sense to use these specific imperial eras' names (Jogan and Konin) as the symbol of the Heian period's former half, so today these names are not used so often.
特に彫刻史の方面では平安時代前期を貞観（じょうがん）時代または弘仁時代と呼ぶこともあったが、特定の元号で平安時代前期を代表させることにはあまり意味がないことから、今日ではこれらの呼称はあまり用いられていない。