User blog comment:Kaido King of the Beasts/Chapter 818: Stepping Stones to One Piece/@comment-4401815-20160303134732/@comment-5398287-20160304003306

Only Oda can answer most of those, but I'm guessing Oden was killed only a few weeks ago at the most - the trauma still seems relatively fresh for those who witnessed it, and the samurai gang fled soon after it happened, meaning that Raizo going to Zou, Kinemon and Momonosuke going to Punk Hazard, and Kanjuro being jailed in Dressrosa couldn't have happened too long afterward.