It has been confirmed by Shinji Takamatsu (Director of Sakamoto desu ga?) on Friday that the 13th and final episode of Sakamoto desu ga? will not aired as planned due to it having one week delayed since episode 2. Due to the special news coverage of the Kumamoto earthquakes in April. So, Sakamoto desu ga? final episode will not be broadcast on television.
He described the removal of this episode from the broadcast schedule as "truly disappointing."
However, the final episode, episode 13, is listed in the official website and listed in the anime's fifth and final Blu-ray Disc/DVD volume, which will ship on October 26.

Just who is Sakamoto? He's enigmatic. He's clever. He's dashing. No challenge is too great and no cause is too small for Sakamoto. Girls love him, guys hate him for it, and despite efforts to humiliate him, Sakamoto is flawlessly able to emerge from the fray, even cooler than ever. Who knows what Sakamoto is going to do next? Whatever it is, it will be fabulous!