Volcano Name Unit name Property Type Property Value Qualifier Error Citation "Takaharayama" "KitaAkata (Kt)" "Magnitude" "5.4" "" "" "Hayakawa (2014)" "Takaharayama" "Otawara ignimbrite (Shiobara caldera)" "Magnitude" "6" "" "" "Hayakawa (2014)" "Takaharayama" "Tk-Ue Tephra" "Maximum VEI" "4" "" "" "Geological Survey of Japan (2006)"