Claim: During 1968, in Ikino Matsubara near Meinohama Station, the use of sandstones and granites were confirmed in the construction of the Genkō Bōrui, then in 1969, Basalt and granite were discovered to be used as well, which was found in Imazu near Shimoyamato Station, a railway station in Japan that JR Kyushu currently operates.
Evidence: Ikino Matsubara near Meinohama Station Use of sandstone and granite confirmed. Imazu near Shimoyamato Station Basalt and granite were used, differing by location. Shimoyamato Station (下山門駅) is a railway station on the Chikuhi Line in Nishi-ku, Fukuoka, Japan. JR Kyushu The Genkō Bōrui was excavated at the locations listed below.