The main cast is as follows:
And two actresses Juri Sakiho and Ootori Ran
Tamamori will be taking on the role of "Champ" - Kame's opponent - the role Shibutani Subaru had in the original cast and the one Tanaka Koki played in the more recent runs of the show.
The show will run from September 3rd to September 29th at Teikoku Gekijou (Teigeki).
Osaka shows or other venues have not yet been announced.
More info will be added to this post as it gets out. The announcement was just made in Japan.
Source: DUET Magazine Official Twitter, TVFan, TVPia