The upcoming second season of the Tokyo Ghoul anime will be 24 episodes long, according to a leak on the anime’s official chinese site. This website itself accidently leaked that there will be a second season of the series a few weeks before the official announcement.
At the time of this article, there is no traces of the 24 episode announcement on the website or any official confirmation since, so be weary of this leak despite the site leaking correct information in the past. If the series were to be 24 episodes long then Tokyo Ghoul √A will span two seasons, the Winter 2014/2015 anime season and the Spring 2015 season, starting from January and ending in June.
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.