He is best known for playing the role of the pink-haired Yuri Kyohei in the 2019 romantic comedy drama A Story to Read When You First Fall in Love, as well as Hikari Nonomura (ToQ 4gou) in the 2014 Super Sentai TV series Ressha Sentai ToQger.

[3] When he was a sixth grader, Yokohama was discovered by a talent scout while with his family on his first trip to the trendy Tokyo neighborhood of Harajuku.

[6] He served as a male model of the fashion magazine Nikopuchi through a public audition.

[4] In 2013, Yokohama made regular appearances in the drama Real Onigokko The Origin.

In 2011, he won the 7th International Youth Karate Tournament for boys aged 13–14 in the under 55kg division.