I thought that once a kadoban finishes with make-koshi, he loses the ózeki rank and that's all. Now i read on tachiai.org that :
"The big news, of course, is that we lose one Ozeki (at least temporarily) and gain another. Tochinoshin (7-8) will be ranked Sekiwake at Natsu, with a one-time shot to regain his rank with 10 victories."
Is it so? Is it official, or a custom, that finishing with a "yokozuna kachi-koshi", you get back to ózeki?