[2] On March 29, 2019, Shiramata graduated from D-Boys and left Watanabe Entertainment.
[5] In Kamen Rider Gaim, while playing Ryoji Hase, the staff asked him to bring out his own personality.
His co-star Ryo Matsuda said that he resembled in the character in being gentle with a strong hungry spirit part.
[5] In Kamen Rider Gaim, Shiramata was given stern words from director Hidenori Ishida and shed tears on the set.
[5][6] Ishida praised Shiramata's performance after filming,[5] as did the screenwriter Gen Urobuchi.