Line map of Seto Electric Railroad (1936-39?). Hyōtan-yama Station was opened on June 3, 1936.  The Seto Electric Railway was absorbed into the Meitetsu group on September 1, 1939.Reference material:

"瀬戸電鉄",Meitetsu Memorial Museum &lt;Reprint series of Meitetsu Timetable&gt; ,1998.
Own work
ButuCC