Surii (ãÂÂãÂÂãÂÂ; born September 28, 1994), also known as Three, Threee (stylized in all caps), or 3, is a Japanese Vocaloid producer and singer-songwriter. He is known for his work in the Vocaloid community, with notable songs including "Telecaster B-Boy", "Ego Rock", "Junkie Night Town Orchestra", and "Lavie". He is also a member of the rock band Aooo and is a songwriter and producer for other artists, including Ado.
In 2017, Surii moved to Tokyo aiming to become a professional composer. On March 3, 2018, he began his career as a Vocaloid producer with his first song "Kà «chà « Bunkai", choosing the date as a wordplay on his name, since "Surii" (ãÂÂãÂÂãÂÂ) is pronounced like the number "three" in Japanese. Early in his career, he posted short videos of 60 seconds on Nico Nico Douga and YouTube, influenced by the 60-second video limit on Twitter at the time. Based on the audience's reception, he would expand them into longer versions.
His work quickly gained popularity, with his songs "Telecaster B-Boy" and "Junkie Night Town Orchestra" reaching millions of views on YouTube. In May 2020, he released his debut album, Pandemic'. It was originally self-published and sold via doujin mail order before receiving a nationwide retail release. He uses VOCALOID software such as Kagamine Len and Hatsune Miku. Over time, his songs became more personal, leading him to transition to using his own vocals.
In August 2023, he began performing as the guitarist of the four-person rock band Aooo, formed with Riko Ishino, Hikaru Yamamoto, and tsumiki. In February 2024, his song "Telecaster B-Boy" was adapted into a novel by MF Bunko J. The novel was written by Surii himself, making it his debut full-length written work. In August of the same year, it was adapted into a manga and began serialization in the September issue of Monthly Comic Gene.
He is also a member of the Vocaloid producer group DREAMERS, which includes Ayase, , and tsumiki; the members remix each other's songs.
Surii became interested in music during high school after being inspired by the anime K-On!. He played guitar in a band with his friends, covering songs from the series. He continued pursuing music while studying architecture in college and later dropped out to pursue music full-time.
He is often described as friendly and outgoing, though he has mentioned that his creative process tends to bring out a more introspective and darker side, as he reflects on his personal struggles. He enjoys watching older anime series such as Code Geass and Gundam, particularly the final episodes, which he re-watches frequently. He played the card game Duel Masters, which he competed in during his school years.
Surii's decision to work anonymously as a Vocaloid producer came from his experiences in bands and songwriting contests, where he felt pressured to meet others' expectations. He wanted a creative outlet that would allow him to express his feelings more freely. His musical style is influenced by wowaka, particularly in his use of guitar phrases and rhythmic patterns. He has also cited Hidekazu Tanaka as an influence, especially for his ability to combine complex chord progressions with pop melodies. Surii has stated that he aims to create his own signature sound by using the same instrument samples repeatedly in his songs.
He finds collaborators through a dedicated Twitter account, where he follows only illustrators and video creators. He often prefers working with emerging or lesser-known artists, seeking out fresh talent for his projects.