Byakko's Trial! Touma vs. Haruya (Japanese: 白虎の試練!トウマVSハルヤ,Byakko no Shiren! Touma vs. Haruya) is the 45th episode of the Yo-kai Watch Shadowside anime. It will be broadcasted in Japan on March 1, 2019.
In order for Natsume to awaken as Shuka, the Princess of the Oni Tribe, the 5 Yōseiken are needed. To get the last Yōseiken, the “Byakko Daireisō”, Natsume and the others enter the Reiken Forest. However, Haruya shows up there, insisting to get the “Byakko Daireisō” himself, and rushes into the forest. Akinori and the others try to follow, but everyone except for Touma is held back by an invisible wall. It appears that only people chosen by Byakko can pass through. Touma decides to go ahead by himself, to find the “Byakko Daireisō”. Meanwhile in the human world, the Soranaki Virus appears in large quantities. Yo-kai infected by it begin to attack humans.