Board Thread:Naruto News/@comment-2156952-20150115130338/@comment-1512913-20150116114408

Seelentau wrote: Kishimoto didn't write The Last.

Also, if those novels are canon, is the Jinraiden book canon as well? He:
 * contributed the "lore"
 * designed the characters
 * agreed with the proposed script after several rewrites

By your logic the early manga and databooks aren't canon either because he had an editor telling him what and what not.