Junichi Okayama (岡山 純一, Okayama Jun'ichi, born September 23, 1977, in Itabashi, Tokyo, Japan),[1] better known as Jin Shirosaki (城咲 仁, Shirosaki Jin), is a Japanese entertainer and radio personality who is represented by the talent agency, Sun Music.
He made a name for himself in Japan as a celebrity host and said that at the time, his annual income exceeded 100 million yen.
In early 2005, he suddenly retired as a host and became a tarento the same year.
Shirosaki was later contracted by Sun Music and worked mainly on variety show.
On June 21, 2006, he made his singing debut with "Bulldog", together with Masatoshi Sakai, and produced by Four Leaves.