More accurately called "elder stock" or toshiyori kabu, these names are a finite number of licenses that can be passed on, and are strictly controlled by the JSA.
They allow certain advantageous privileges and there are official criteria for whether or not a retiring wrestler can acquire one.
Members with borrowed kabu are always at the bottom of the hierarchy (aside from consultants) and are listed here with the name of the owner, if known.
'Councilor') is not a rank, but a group of independent councillors who act as a kind of supervisory board for the directors.
In March 2018 they were replaced by three former wrestlers who are completely outside the Sumo Association: Fujinokawa, Washūyama and Asanosho.