The official website for KonoSuba revealed today that the upcoming anime will be releasing January 2017.
The series started as a light novel series which began October 1st 2013 and is still ongoing. A manga for it would also be adapted which first released September 9th 2014 and is also currently still continuing. Mind you that both the light novel and manga series are licensed by Yen Press and are releasing in the west. The anime adaption of the series would later begin on January 14th 2016 and will be ended March 17th 2016 with 10 episodes releasing. A plot summary of the series can be seen below quoted from MAL:
Kazuma Satou, a high school student, gamer and shut-in, died on an average day walking home from school, performing the one heroic act of his life. He reawakens in the afterlife, greeted by a beautiful but rude girl named Aqua, who claims to be a goddess that guides the youth whose lives got cut short. Aqua then offers him a choice: to go to heaven, or to get sent to a another world to defeat the Demon King. Of course, Kazuma’s gamer instincts kick in, and he chooses to start a new life in a real-life RPG.
There’s one last choice Kazuma has to make: he is allowed the choice of one thing to take with him to the new world. After puzzling over it, he chooses…Aqua?
Join Kazuma on his adventures as he tries to transfer his virtual gaming knowledge to real-life adventurer experience!