Conversation so far:
what happened regarding Gackt in 2008?
On December 14, Gackt went on his longest nationwide tour Requiem et Reminiscence II.
was the Gackt Requim et Reminscence II tour popular?
The Gackt Requim et Reminscence II tour included over 60 concerts in more than forty-five cities, reaching an audience of over 210,000 spectators.
when did he go on tour?
On December 14, Gackt went on his longest nationwide tour Requiem et Reminiscence II.

Question: what was re:reborn?
Self-contained rewrite: what was re:reborn?