Conversation so far:
When was Kim Jae-joong's first solo album released?
Kim Jae-joong's first full-length solo album, WWW was released on 29 October 2013.
Did Kim Jae-joong's first album WWW  receive any awards or recognition?

Question: How many solo albums has he released?
Self-contained rewrite: How many solo albums has Kim Jae-joong released?