Yoh Kamiyama (神山羊; Kamiyama Yoh), is a singer-songwriter, and vocaloid song producer who originally went by 有機酸 (Yuukisan/uki3/ewe). He debuted in November 2018 with the song “YELLOW” and became viral on various social media, such as TikTok.

In the same year, he also produced “涙は雨粒 (Namidaha Amatsubu)” and “はじめましての気持ちを (Hajimemashite no Kimochi o)” for Daoko, and also featured in “24h.”

In 2019, he released a mini album Shiawase Na Otona which contains his debut song in April, and another mini album Yumemiru Kodomo in October.

Kamiyama would make his major label debut under Sony Music Associated Records (under Sony Music Entertainment Japan) by singing the opening theme song for the 2020 anime 空挺ドラゴンズ (Drifting Dragons), with the song “群青 (Gunjou).” He was also appointed as the theme song singer of the 2021 anime Horimiya with the song “Irokousui.”

He diligently released multiple singles such as
“Laundry” in September 2020, “Girl.”—which produced by ESME MORI—in August 2021 and “Kamen” in September 2021, which served as the theme song of TELASA drama 僕らが殺した、最愛のキミ (Bokura ga Koroshita, Saiai no Kimi). As well as “Seventeen” in March 2022.

In April 2022, he released his first full-length album, CLOSET. Still in 2022, he released a featured single with Tomoko Ikeda titled “Summer Time” and produced “Kohakutou” for a Hololive VTuber, Nekomata Okayu.

In September 2022, he became the ambassador for Sony XPeria and produced the music video of “Summer Time” in collaboration with the brand, which entirely recorded using Sony XPeria 5 IV. In one of his interview with the brand, he said that the remix of Seventeen was recorded using Sony XPeria Music Pro, saying it sounds like being in a studio.