[2] He is cousins once removed with musical actor and singer songwriter Teppei Koike.

[4] In 2012, he costarred in Shiritsu Bakaleya Koukou with future SixTones groupmates Yugo Kochi, Jesse, Shintaro Morimoto, Hokuto Matsumura, and Juri Tanaka.

[6] In the same year, he also appeared in productions of Elisabeth as Rudolf, Crown Prince of Austria.

Along with SixTones, Kyomoto has starred in other musical stage shows such as Boys between 2015 and 2017 with fellow Johnny's Jr. group Snow Man.

[8] In 2022, his first starring role was in Tsukanoma no Ichika as Yurugi Akifumi, a university philosophy lecturer.