It has been revealed in the upcoming issue of Shueisha’s Weekly Shonen Jump magazine that the second season of Yusei Matsui’s Assassination Classroom (Ansatsu Kyoushitsu) anime will be airing in January 2016, during the Winter 2016 anime season.
A new key visual featuring the students of Class 3-E for the upcoming climax of the first season was revealed earlier:
Assassination Classroom (Ansatsu Kyoushitsu) synopsis:
The students of class 3-E have a mission: kill their teacher before graduation. He has already destroyed the moon, and has promised to destroy the Earth if he can not be killed within a year. But how can this class of misfits kill a tentacled monster, capable of reaching Mach 20 speed, who may be the best teacher any of them have ever had? -Haruhichan