are you ready for an Arashi matsuri???

First, a little quibbling: Why do they call the latest concert of Arashi as “Arashi-fes” instead of “Arashi-fest”? I hope it’s just a translation mistake because when you shorten festival (matsuri) in English, it is “FEST” and not “FES”. It looks baka (stupid) to say “Arashi-fes”. I mean, do you say… “film FES”??? Perhaps it’s…