Sakai, Mikio

Mikio Sakai is a Japanese singer-songwriter. His real name is Mikirou Sakai (酒井 幹郎). He made his debut with the single "Ima dake wa Kimi wo Hanasanai."

He has composed, written and performed numerous songs for several anime, including Fantastic Children, Tsubasa Chronicle, the Gorou Taniguchi-directed Sunrise productions, Planetes, s-CRY-ed, Code Geass, as well as various other media.

(Source: Wikipedia)