The Shishinden Hall was a main hall where ceremonies like the Emperor's genpuku (attaining manhood), investiture of the Crown Prince, and Sechi-e (seasonal court banquets) were held, in the Imperial Palace which was the Emperor's private place.
紫宸殿（ししんでん）とは、天皇の私的な在所であった内裏において、天皇元服や立太子、節会などの儀式が行われた正殿。