Hoan-den was the premises where portraits of the emperor and empress (called "goshin-ei portrait") and the Imperial Rescript on Education were housed before and during the war.
奉安殿（ほうあんでん）とは、戦前戦中にかけて各地の学校で、天皇皇后の写真（御真影）と教育勅語を納めていた建物のこと。