Toshimitsu Deyama, known exclusively by his stage name Toshi (currently stylized as ToshI and previously in all capital letters), is a Japanese singer-songwriter. He is childhood friends and classmates with bandmate Yoshiki. He is best known as vocalist and co-founder of the heavy metal group X Japan, which disbanded in 1997; it was later revealed that he had married and joined a cult. Toshi then went on to have an extensive solo career. In 2007, X Japan reunited and began an ongoing world tour in 2010.