Shouldn't it just be 28? RISING was/is the production title. Just because they didn't have a giant 28 in the background doesn't mean that it wasn't the 28th show. They (TBS) currently acknowledge RISING as the 28th tournament: www.tbs.co.jp/sasuke_rising/history/
Good point. I don't know Japanese besides numbers, but I do remember hearing "dainijuhachi SASUKE" (28th SASUKE) various times during the broadcast. Besides, the numbering of tournaments after 27 using this method may prevent further confusion if we correct it now on the wiki.