User blog comment:Staw-Hat Luffy/Why?/@comment-4938779-20130417032956/@comment-8298508-20130418015817

Because he is a "Secret Agent" (perhaps)

All admiral level who absence in "Marineford battle" (such as : Vergo, Fujitora or Maynard the Pursuer) considered as "Secret Agent". lol.

FYI, as an marine admiral, Fujitora also didn't come to Marine Admiral gathering at "one piece Z movie"