samfree

samfree, real name Sano Takayuki (佐野貴幸), was a smash-hit VOCALOID artist who dabbled in many different genres. His most notable works were the Night Series, featuring "Luka Luka★Night Fever" and "Megu Megu☆Fire Endless Night", which had reached over one million views.

samfree was also known as a Nico Nico singer.

He passed away on September 24, 2015.

(Source: Vocaloid Wiki)