DDT announced today that, while not happening yet, the KO-D 6-Man Tag Team Championship will soon be VACANT. Current champions Yukio Sakaguchi, Saki Akai & Hideki Okatani will give up the titles on 11/12 because Akai will retire that day and no more defenses are scheduled before then. Determination tournament to crown new champions will be held on 11/16.
More as it becomes available.
(Side note: They also hold the All-Japan 6-Man Tag Team Championship and are scheduled to defend that title Saturday)