User blog comment:12th Supernova/5 Star Wanted Level/@comment-4161592-20140507113747/@comment-24638955-20140507115227

I think that they just have an efficient net of information with Den den mushi on the Chair's room they had a lot with suborinates in charge of them.

The middle upper panel http://www.mangareader.net/one-piece/743/15

Meaning that also a decent quantity of subordinates out there have Den den mushi to report.