
Quick answer — Masayuki Onji worked on The Disastrous Life of Saiki K. Season 2 (Character Design), The Disastrous Life of Saiki K. (Character Design), The Disastrous Life of Saiki K.: Reawakened (Character Design) and 2 more anime.
Masayuki Onji worked on The Disastrous Life of Saiki K. Season 2 (Character Design), The Disastrous Life of Saiki K. (Character Design), The Disastrous Life of Saiki K.: Reawakened (Character Design), ARIA The AVVENIRE (Character Design), Cromartie High School (Character Design).