to be honest, i guesses this is a cross server event before the maintenance finish (from the youtube video i watch when research other thing in game/ new ninjas). It make sense to be a cross server event consider you may get minato edo or sage of the 6 path from the event (from one of the video i watched). However, a bug happened to paypal recharge on the first days so i can't do any recharge thus have no gold to spend to get ranking. On the second day it is fixed but when i look at event ranking it is completely empty which is very fishy. So i went on forum do some research and wait for a while. Eventually a bug confirm appeared and what disappointed me is the developer said " they will update the ranking at the end of the event ". Without the ranking how exactly do i know how much it is going to cost to win 1st 2nd or 3rd? anything below 3rd is worthless lolz...This kind of event demand a on fly ranking update just like how sakura gift work. Given the ranking after the event is over doesn't help since it wont change the ranking anyway.