The Dreadful Joker the Ripper (Japanese: 戦慄の切裂きジョーカー,The Dreadful Joker the Ripper) is the 10th episode of the Yo-kai Watch Shadowside anime. It was broadcasted in Japan on June 8, 2018.
The strange incidents surrounding “Joker the Ripper” give off a strong feeling of danger. It seems that Joker the Ripper is a clown-like man, looking just like the Joker from playing cards, who approaches women walking at night from behind, coming at them with two sharp sickles to cut them. In order to lure in Joker the Ripper, Akinori dresses up as a girl and the Joker attacks Akinori with both sickles, but Touma drives him off just in time. Afterwards, Akinori confines himself to his room. Just what has happened to Akinori!?