In February 2010, Katayose participated in the Vocal Audition 2: Yume o Motta Wakamono-tachi e, becoming a finalist.

He then joined Osaka's EXPG (Exile Professional Gym) on a scholarship.

[4] On 19 July 2011, Katayose became a candidate for Generations and an official member on 17 April 2012.

Katayose starred in a leading role for the films, My Brother Loves Me Too Much and Ride Your Wave.

[5] On January 1, 2023, Katayose married actress Tao Tsuchiya, and announced that they are expecting their first child together.