There are contradicting definitions of Mount Seppiko. Yumesaki, which was merged into Himeji City in 2005, officially define Mount Seppiko as the name of a group mountains of Mount Horagatake (884m), Mount Hokotate (950m), and Mount Mitsuji (915m). However, maps of the Geographical Survey Institute of Japan show the peak of Mount Mitsuji as the peak of Mount Seppiko. Many mountain guide books write that Mount Otenjo, one of the peaks of rocky Mount Horagatake, is the default peak of the Seppiko. Other people define the Seppiko as a name of another group of mountains consisting of Mount Horagatake, Mount Hokotate, Mount Mitsuji, and Mount Myojin, Mount Nagusa.