masa (まさ) is a 27 year old producer who first started publishing in April 2011. He mainly uses GUMI and Hatsune Miku, but have also used IA, Kagamine Rin, Sachiko, and Yuzuki Yukari. He makes illustrations for his own songs. His most popular song is 狐の嫁入り (Kitsune no Yomeiri), the remake of which has over 1,000,000 views on YouTube.
masa initially planned to release Dream Walker as his first album, but due to unforseen circumstances, has been cancelled. His new first album, ADULT, was released on March 5th, 2016. His second album, currently referred to as Alcatraz, has been hinted to on Twitter, but does not currently have a release date.
Prior to the release of 鬼火 (Onibi), masa was known as ell and is known to have released three songs under that name: Ijou Aikyou, Interface and Joker. The last of which shared a melody with "JosiKousei", both which serve as a precursor to the song "Gang Attack", released in April 2014.