Board Thread:News and Announcements/@comment-4556650-20140411113722/@comment-3544775-20140413082050

That's an assumption it will use 50 chaps per season, which is not a guarantee at all or good thing. 50 chapters per season is low and it will result in slow pace, which is not good for the anime and it won't make a good adaptation. Also they don't decide to use 40-50-60 chapters, they decide where it would be good to end it, then adjust things to it (same for 2nd season, even if it had 50chapters, a good moment to end it is necessary). If the current arc ends soon, I believe it will be until this arc, as it would be good moment for the anime to end, since it will face up against one of the main enemies and it seems to be major battles, there may be even little time skip after this arc, so I again feel this may be the ideal moment to stop.

In reality they may use 50 chapters per season, but it's unlikely they will do it for the 2nd season too. Usually good adaptation covers more chapters, only the long ongoing series go with 2 chapters per episode in order to not catch up to the manga fast. A normal limited number adaptation don't care about that and can go even 5 chapters per episode (JoJo). Other examples: Kuroko no Basket S1 (~75 chapters); Kuroko S2 (~100 chapters); Magi S1 (~110 chapters); Magi S2 (~85 chapters); Nurarihyon both seasons (~140 chapters) and many more.