It is uncertain whether it comes from the interests in Sung, but Sanetomo asked to bring Buddha's ashes from Neng Ren Temple in Sung, and it has been dedicated to Shariden (reliquary hall) of Engaku-ji Temple.
なお宋への関心からか、実朝は宋の能仁寺より仏舎利を請来しており、円覚寺の舎利殿に祀られている。