The Hollowfication Incident is a major incident detailing the history of the Visored's creation and the ascendancy and fall of Kisuke Urahara within the Gotei 13. It further goes into the onset of the first attempts of Hollowfication by Sōsuke Aizen over one hundred years ago. The incident started with the appointment of Kisuke Urahara as captain of the 12th Division after the promotion of Kirio Hikifune to the Royal Guard. Using his new status, he creates the Shinigami Research and Development Institute in order to put his inventions to good use.