DECO*27 (デコ・ニーナ Deko Niina, born December 16, 1986) is a Fukuoka-born VOCALOID song producer and utaite. His first work got over 100,000 view counts quite suddenly, and his current popularity is stable. His style has been described as a fusion of rock and pop. He had a sub-name called DEKOUS*UK when cooperating with kous and sasakure.UK in ef's album (恋色クローバーピース).

Lately, DECO*27 has been collaborating with kous on a fair number of original songs. While kous provides the arranges, DECO*27 is responsible for the music and lyrics. DECO*27 is also known to frequently collaborate with sasakure.UK.

He picked "DECO" (lit. "forehead") because he has a large one and the numbers "2" and "7," because they are his favorite numbers. A glance at his keyboard inspired the asterisk. The numbers "27" are read "nii-na," as per the Japanese pronunciation.[1]

DECO*27 also stretches his limits outside of VOCALOID, having composed songs for various anime and video games. In 2020, he is in charge of the interactive music project MILGRAM. In 2022, he is in charge of the collaborative music project holo*27 with hololive.

Description taken from: https://vocaloid.fandom.com/wiki/DECO*27

Official website for Otoiro (A studio that Deco*27 is involved with): https://otoiro.co.jp/