User blog comment:Woohoot/Sunny crew/@comment-5869646-20150720133639

This is the longest time a crewmate has been entirely absent from the story. Even during Luffy's solo-adventure, we had the cover series and occasional appearances for all the Straw Hats. This time Nami, Sanji, Chopper and Brook have only appeared in the color spreads and chapter cover requests which obviously aren't part of the actual story.

Last time they really appeared was in 730, 64 chapters ago (≈ 1.5 years ago real world time).