Conversation so far:
What is X Japan?
X Japan is a Japanese rock band from Chiba, formed in 1982 by drummer Yoshiki and lead vocalist Toshi.
What happened with Hide (musician) in 1987?
hide joined X Japan, then called X, in February 1987, becoming the band's lead guitarist and occasional songwriter, going on to compose songs like Celebration, Joker and the single Scars.

Question: What happened in 1988?
Self-contained rewrite: What happened with Hide (musician) in 1988?