Yoshitaka Nishiwaki is a medical examiner for Seito University Hospital and the victim of the Motors Bugster. Nishiwaki was infected by Graphite, who subsequently kidnapped his sister to aggravate Nishiwaki's stress. The coroner was found quickly by his co-worker Kiriya Kujo.
His infection flared into a spiked wheel Bugster Union that was destroyed by Lazer Bike Gamer Level 1, releasing the Motors Bugster. Motors was soon destroyed and Yoshitaka cured by Ex-Aid and Lazer Action and Bike Gamers Level 2. Sometime after Kiriya's death, of which Nishiwaki was unaware of, he would later pass on Kiriya's belongings to Hiiro Kagami, including his laptop which contained important data required to complete the Maximum Mighty X Gashat.
Publication Information
- Ex-Aid : Yoshitaka Nishiwaki
- Japanese : 西脇 嘉高
- Version : Kamen Rider Ex-Aid Series
- Type : Seito University Hospital Medical Examiner / Patient
- Effected by : Graphite Bugster
- Affiliation : Seito University Hospital
- Gender : Male
- HomeWorld : Earth
- Season : Kamen Rider Ex-Aid
- First Appeareance : Kamen Rider Ex-Aid Episode 4 : An Operation Called Dash!
- Last Appeareance : Kamen Rider Ex-Aid Episode 22 : Engineered History!
- Number of Appeareance : 2 (Ex-Aid)
- Potrayer : Takuya Negishi
- Main View : Full Episod
Kiriya's Absence:
- "Has something happened to Kiriya? I mean, I haven't been able to contact him for a while, so I'm worried." "So are we, that is why I came here to find clues." ― Yoshitaka and Hiiro

















