Those that have been watching the currently airing third season of Natsume Yuujinchou will know that the final episode is due out very soon, so it comes as quite a surprise that a sequel has already been announced! The aptly named Natsume Yuujinchou Shi (or Natsume's Book of Friends Four) will begin airing after the upcoming season, in January.
The reveal itself was made in the November issue of LaLa magazine. If the previous three series are anything to go by, you can expect another thirteen episode block of supernatural awesome.
Source: Japanator