NewS (Kato Shigeaki & Koyama Keiichiro ) - Murarisuto
NewS (Koyama Keiichiro) - Uri Sarang
NewS (Koyama Keiichiro) - Love Addiction
NEWS (Keiichiro Koyama) - Romeo 2015 [2015] WHITE
NEWS (Keiichiro Koyama) - Elegy of love
NEWS(Kato Shigeaki & Koyama Keiichiro) - Chirarizumu [チラリズム]
NEWS (Kato Shigeaki & Koyama Keiichiro) - Chirarizumu
NEWS (Koyama Keiichiro) - Starry
NEWS (Koyama Keiichiro) - Beautiful Rain
NEWS (Koyama Keiichiro) - Starry (Original Karaoke)
NEWS (Kato Shigeaki & Koyama Keiichiro ) - Murarisuto