Conversation so far:
What happened in 1964 with the musician Hide?
The musician Hide was born at St. Joseph's Hospital in Midorigaoka, Japan, on December 13, 1964.
What school did the musician Hide attend?
The musician Hide went on to attend Yokosuka Tokiwa Junior High School.

Question: When did he first start playing music?
Self-contained rewrite: When did the musician Hide first start playing music?