The final volume, the 34th, is scheduled to be released on June 9.
With the final volume of Attack on Titan hitting store shelves in Japan on June 9, a special advertisement thanking fans for 12 years of support has started on one of the biggest (and newest!) displays in Shinjuku Station.
The Attack on Titan manga started in September 2009 and has so far released 33 volumes of the series in Japan.