Geosite List Home Geosite The Kaimochijima Rock in Shiko The Kaimochijima Rock in Shiko This is where the trumpet shells were blown to give signal for the ridgepoles coming in when people were transporting lumber by the river. Right now, this place is used as a stop for water jet boats. Map The Kaimochijima Rock in Shiko 33.8146368,135.8583498,14 See in the map app