He tells Ranpo that he possesses a supernatural "Ability" called Super Deduction .
The first episode of Bungou Stray Dogs Season 4, titled serves as the beginning of the "The Untold Origins of the Detective Agency" arc. It is a flashback episode set approximately 12 years before the main series, focusing on how Yukichi Fukuzawa and Ranpo Edogawa first met . A Chance Encounter Bungou Stray Dogs 4 Episodio 1
He gives Ranpo a pair of plain glasses, claiming they are a "control device" to help him focus his power. He tells Ranpo that he possesses a supernatural