Kenichi Maeyamada is a Japanese composer and musician. His primary work is composing anime theme songs and for J-pop musicians. Under the pseudonym Hyadain (ヒャダイン?), he has released a number of anime and video game music remixes, as well as original songs. These remixes have received over 20 million hits on YouTube and Nico Nico Douga.
Maeyamada began playing the piano at age four and first composed with a synthesizer in middle school. After graduating from Kyoto University, he apprenticed under lyricist Gorō Matsui. He got his first big break in 2007 for writing the lyrics to the opening theme of Initial D Fourth Stage, "Don't Go Baby". In December 2007, he posted his first work under the name "Hyadain" on Nico Nico Douga, a remix of Crash Man's theme from Mega Man 2 with added lyrics. He initially struggled with criticism and accusations regarding these remixes' faithfulness to the source material. However, his videos gradually gained in popularity, particularly "Four Fiends of the Elements" from Final Fantasy IV and "Western Show" from Super Mario World. In May 2010, Maeyamada revealed that Hyadain was his pseudonym.
Maeyamada cites Yasuharu Konishi of the Pizzicato Five as a major musical influence, as well as Shoichiro Hirata and Yusuke Itagaki. He composes using a 64bit PC. Influence on his video game music stems from Nobuo Uematsu (Final Fantasy), Koichi Sugiyama (Dragon Quest), and Kenji Ito (Romancing SaGa). For his own songs, he provides all the voices, male and female, with the help of a digital voice modifier. These voices, Hyadain and Hyadaruko, appear as characters on his blog and in the music video for "Hyadain no Kakakata Kataomoi-C".