First off, no one here speaks for Tom Wong, so stop taking about him.
Yoshi made the comment that Tom had defeated BJJ Black Belts, he was asked which ones.
No answer.
Tom Wong never said he defeated ANY GRAPPLER, this is about Yoshi and what he said.
Second, Jodan ( 10 Dan BB) in Shotokan is very rare and is given as an honorary title to those that have been in SHotokan for decades and have done great things in the name of Shotokan, just like the Jodan is given to anyone else in any Karate organization.
Pretty much anything over 5th Dan is "political" and done in terms of recognition and that is typical in all "belt" systems.
In other words, you don't TEST for a 6th dan or an 8th Dan, they are awarded to you by the commitee the heads up the organization.
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !