Thanks to Seibundo Bookstore Chain tweeting a copy of the latest volume of Fuse and Mitz Vah's That Time I got Reincarnated as a Slime, we can see from the wraparound that an anime adaptation has been confirmed.
The manga, which reportedly has 4.5 million copies in circulation, was a nominated in our manga of the year awards, with Manga Editor Ross surprising the panel with a passionate endorsement of the title (you can hear his sexy flu-infested voice in the 4th-day awards podcast here).
In his review, Ross praised the title for its unusual commentary addition and subversion of storytelling tropes:
"Wit, charm and self-determination win the day for an unlikely new hero."
The anime is scheduled to debut in Autumn.
Source: Anime News Network