Otakura is Switch's friend in the Sket Dance franchise.
His past has not been revealed yet.
Even though Kenta Shinohara, the creator, did not say anything specific about what inspires him to create Otakura, it is assumed that Otakura's name is a play on the Japanese word, Otaku. Otakura is an anime Otaku. He first appears in Sket Dance volume 1 and Sket Dance episode 5. His Japanese voice actor is Kozo Dozaka (or Kouzou Douzaka).