Nishioka Kengo

 (西岡健吾) is a freelancer, radio host, former Japanese idol, former founding member of ONE BY ONE and MAG!C☆PRINCE.

He graduated from MAG!C☆PRINCE on December 20, 2019.

In June 2020, Nishioka revealed that the reason for his withdrawal from MAG!C☆PRINCE was that Osawa Tsuyoshi, managing director of Watanabe Entertainment and producer of the group, had sexually assaulted him continuously since 2018. As a result, the company dismissed Osawa from the Board of Directors on June 11 and suspended him while an investigation was conducted.

He's the host of the K-mix radio program Shizuoka FM every Friday 19:30-20:00.

He graduated from ONE BY ONE alongside all other members on December 31, 2021.

Albums

 * 111
 * B e l ! e v e r

Singles

 * Zettai☆Aishiteru!
 * Spin the Sky
 * Over The Rainbow
 * UPDATE
 * YUME no MELODY / Dreamland
 * Best My Friend
 * SUMMER LOVE
 * Gomen,, Hanashitakunai

Digital Singles

 * Ittsuu LOVE
 * SAKURA my friends

Video Releases

 * Honki Dora ~Spin the Sky~
 * Bakumatsu☆PRINCE
 * Honki☆LIVE at Zepp Tokyo
 * Honki☆LIVE Vol.7 in Nippon Gaishi Hall ~MAG!C☆PRINCE 3rd Anniversary~

Photobooks

 * MAG!C☆PRINCE FIRST PHOTOBOOK

Trivia

 * Self-proclaimed Idol Otaku.
 * Has been a BOYS AND MEN Kenkyusei for a very short period of time.