There was a report two weeks ago that mentions that the second season of the anime adaptation of Sui Ishida’s Tokyo Ghoul will be 24 episodes long. Ishida has recently went on Twitter and revealed to fans that Tokyo Ghoul √A will actually be 12 episodes long, debunking the leak.
@Unknownbutcool あ、sorry、シーズン２は12エピソードだ（I misunderstood that you talk about total episode…!）
— 石田スイ (@sotonami) December 20, 2014
The upcoming second season will be based on a new original story written by Ishida, rather than adapting the remainder of his original manga. The series will once again be animated by Studio Pierrot (Naruto Shippuden, Bleach) and the majority of the cast and staff will return to reprise their roles. The second season itself will be airing from January 8 next year on Tokyo MX, before airing on TV Osaka, TV Aichi, TVQ, Dlife and ATX-1 in the subsequent days. There will also be an advanced screening session of the first episode on January 4 at the Toho Cinemas in Nihonbashi. More information about ticket purchases will be revealed soon.
Additionally, the first promotional video for the upcoming series was earlier released:
And the first commercial was also released online:
Tokyo Ghoul is a manga series by Sui Ishida. It was serialized in Shueisha’s seinen manga magazine Weekly Young Jump between September 2011 and September 2014 and has been collected in thirteen tankobon volumes as of August 2014. A prequel titled Tokyo Ghoul: JACK is running online on Jump Live and a 12-episode anime television series adaptation by studio Pierrot aired on Tokyo MX between July and September 2014. A second season has been announced.
Tokyo Ghoul synopsis from Haruhichan:
The suspense horror/dark fantasy story is set in Tokyo, which is haunted by mysterious “ghouls” who are devouring humans. People are gripped by the fear of these ghouls whose identities are masked in mystery. An ordinary college student named Kaneki encounters Rize, a girl who is an avid reader like him, at the café he frequents. Little does he realize that his fate will change overnight.
Tokyo Ghoul √A will be airing from January 8 next year during the Winter 2014/2015 anime season on Tokyo MX for a total of 12 episodes. An advanced screening of the first episode will be held at the Toho Cinemas in Nihonbashi on January 4. More information will follow soon.
Source – Sui Ishida Twitter