Kammala jumla mai zuwa: Raijinyama kofun shine mafi girma a yankin Tōhoku kuma yana saman dutsen Natori inda yawancin manyan tumulus suka tattara, suna kallon filin Sendai. Yana da tsawon mita 168, kuma an taɓa kewaye shi da wani ɓangare. An gina shi a matakai, a wani ɓangare ta amfani da layin dutsen na halitta, kuma an taɓa rufe shi da "fukiishi". Wani bangare na tumulus na baya ya rushe a lokacin
2011 Tōhoku girgizar kasa, yana nuna cewa ya ƙunshi akwatin gawa na yumbu ko akwatin gawa na katako a cikin ɗakin binnewa.