I don’t know, nor have I ever met Mr. Abbott, and don’t have nice things to say about his technique or marketing... “Executive Samurai” classes are really not traditional budo in my book...
Simply put, the question was asked about his Toyama-ryu rank, and, using Google, I found and included the link to the page that had his ranks listed. As to the validity of these ranks, I have no comment, nor do I particuarly care.
As to Chanbara and the separation of ranks, I know nothing about the art, so I couldn’t help you there either. Maybe someone else can answer.
Muso Jikiden Eishin-ryu Iaido
Dentokan Aiki Jujutsu