According to the Sankei Shimbun newspaper and the public television network NHK, the suspect had been posting on message boards threatening to murder anime director TATSUKI (first Kemono Friends anime, Kemurikusa), as well as a Kemono Friends voice actress, her family, and staff members, by stabbing and setting them on fire.
TATSUKI directed the first season of the Kemono Friends television anime at the studio Yaoyorozu, but not Kemono Friends 2.
NHK identified the voice actress as Yui Ishikawa (Kemono Friends 2’s Kyururu, Attack on Titan’s Mikasa Ackerman).
The television anime version of TATSUKI and irodori’s Hentatsu project began airing in Japan in January.