*Reward upon clearing: [[Shinden (Magnificent Lightning) Kai|Shinden Kai]] (震電改).[[File:E-4_Map_May_Event.jpg|thumb|350px|E-4 Map]] | *Reward upon clearing: [[Shinden (Magnificent Lightning) Kai|Shinden Kai]] (震電改).[[File:E-4_Map_May_Event.jpg|thumb|350px|E-4 Map]] |