Conversation so far:
Did X Japan tour in 1987?
X Japan, then called X, released their first album Vanishing Vision, through drummer Yoshiki's own Extasy Records, on April 14, 1988 and toured extensively in support of the record.
What happened in 1987 with the musician Hide?
The musician Hide joined X Japan, then called X, in February 1987.

Question: What is Oricon?
Self-contained rewrite: What is Oricon?