Camellia かめりあ
Background information
Also known as	Cametek Quarks[1]
Born	Masaya Oya (1992-09-28) September 28, 1992 (age 33) Asahikawa, Hokkaido, Japan
Genres	J-core EDM hardcore drum and bass gabber trap speedcore dubstep denpa doujin Vocaloid (early)
Occupations	Composer record producer DJ streamer
Years active	2003–present
Labels	EDP KamelCamellia
Website	https://cametek.jp/

Masaya Oya (Japanese: 大箭将也, Hepburn: Ōya Masaya; born September 28, 1992), known professionally as Camellia (Japanese: かめりあ, Hepburn: Kameria), is a Japanese electronic musician and record producer. He is best known for his work in the rhythm game scene and has been a composer for games such as Sound Voltex, Hatsune Miku: Project Diva and Beatmania IIDX. Outside rhythm games, he has worked with the record label Pony Canyon and is a member of the label EXITTUNES Dance Production or EDP, an imprint of Exit Tunes. He also publishes his discography on his doujin circle, KamelCamellia.

Oya began his career with a Vocaloid sound. After leaving the scene in 2013, he primarily composed fast-paced electronic dance music (EDM) tracks, often reaching or exceeding 200 beats per minute (BPM). His music encompasses a variety of electronic styles, including J-core, dubstep, denpa, drum and bass, hardcore, gabber, trap, speedcore, and doujin music. Rather than adhering to a single genre, he is noted for actively experimenting with diverse sounds across his works.

He often collaborates with and has released several albums alongside the singer Nanahira. He has also produced remixes of the Undertale original soundtrack (OST) and collaborations with the game designer and composer Toby Fox. His track "Ghost" gained attention as one of the hardest songs in the VR rhythm game Beat Saber at the time of its release. He is popular outside of Japan through the video game osu!, where he has a dedicated fan community. Oya is also an active streamer on Twitch.^[2]

Masaya Oya^[2] was born in Asahikawa, Hokkaido, Japan, on September 28, 1992.^[a] Oya developed an interest in music from a very young age; at ten, he began teaching himself how to play the piano. That same year, in 2003, he started producing music using his mother's computer.^[4] His first composition was created as a theme song for an online friend he met through a Flash game.^[5] He started uploading his original songs to Niconico.^[6] He also started using the voice of the vocal synthesizer software of Hatsune Miku and became a Vocaloid producer, releasing his debut album Honeyginjerale in 2010.^[2]

On August 9, 2011, Oya announced that he had contributed a track to Alstroemeria Records, a doujin circle led by Masayoshi Minoshima, known for producing the Touhou Project arrangement "Bad Apple!!". The track was the 10th song on the album and was described as a "danceable" piece with tech house influences.^[7] Oya has frequently collaborated since 2012 with the singer, utaite and VTuber Nanahira (Japanese: ななひら), with whom he has made several denpa albums. In 2013 he released the song Systematic Love which was covered by Reol two years later.^[2] In the same year, following his DJ performance at Voca Nico Night, a Vocaloid music event held on July 14,^[8] he appeared on Fuji Television.^[9] By the end of 2013 he left the Vocaloid scene for more general electronic music and released the album Paroxysm.^[2] Oya composed the song theme "Drag the Ground" for the race team Good Smile Racing in 2014.^[10][11]

He has collaborated with the Pony Canyon record label^[12] and is a member of the labels EDP^[13] and beatnation Rhyze.^[4] Furthermore, he publishes his discography under his own doujin circle, KamelCamellia.^[14] Oya also appears as a guest in other doujin circles such as Hardcore Tano*C. He became involved with the label through DJ Genki, who introduced him to its network of artists. His collaborations within the label include recordings such as Kasai Harcores, which brought in multiple producers for live performances.^[2] In March 2015, he performed live music at the Exit Tunes Dance Party event along with other beatnation Rhyze musicians.^[15]

In February 2018, he won the Outstanding Performance Award at the 7th Konami Arcade Championship (KAC) Original Song Contest for the song "Xéroa".^[16] That same year in December, Oya became a featured artist in the rhythm game Osu!, meaning that selected tracks by the artist can be freely used in the game.^[2][17] He continued to contribute to rhythm game culture with three original compositions for Beat Saber in 2019,^[18][19] followed by additional tracks in January 2020.^[20][21] Among them, "Ghost" gained recognition as one of the most challenging levels in the game and was ranked 76th in Vulture's 100 Hardest Video-Game Levels of All Time.^[22] Oya's studio work also reached mainstream charts; his 2020 album Xronial Xero entered the Billboard Japan Top Albums Sales Chart on March 25, 2020, peaking at number 68 in its only week on the ranking.^[23] That same year, he composed an original soundtrack for the platformer Mad Rat Dead,^[24][25] which was compiled into a three-disc album.^[24] In July 2022, Oya collaborated with VTuber Houshou Marine of Hololive Production to compose the single "I'm Your Treasure Box",^[26] which was later included in the album Ahoy!! You're All Pirates♡, released on October 16, 2024.^[27][28] The album sold 21,633 copies in Japan, as published by the Oricon Albums Chart.^[29] Between these releases, in August 2022, Oya worked with Undertale creator Toby Fox on the track "Summerblue", which was featured in Beatmania IIDX 30 Resident.^[30][31] In February 2024, Oya collaborated with Robert Topala to add several of his tracks to the music library of rhythm-platformer game Geometry Dash.^[32]

Oya primarily composes fast-paced electronic dance music (EDM) songs that are usually at or above the 200 beats per minute (BPM) mark.^[2] His music is described as J-core,^[1] dubstep, trance, drum and bass, hardcore, gabber, trap, speedcore,^[2] and doujin music.^[33] Théo Forey notes that unlike many electronic artists who focus on a single style, Oya stands out for spanning a wide range of genres, rather than focusing on just one.^[2] He is known for making music for many rhythm games, such as Hatsune Miku: Project Diva,^[34] Sound Voltex,^[2] Arcaea,^[35] and Chunithm.^[36] Regarding his role within the Exit Tunes label, Oya has described himself as "the engine of the label", stating that he aims to contribute to the label's momentum through the number of songs he writes and noting that few artists can consistently produce 100 fast-paced songs per year.^[37] Oya's contribution to the soundtracks for Mad Rat Dead featured a "happy electro" track, as described by IGN Japan.^[24]

Below are the albums, EPs and singles the artist has created over time:^{[38][39][40][41][42][43]}