Conversation so far:
What did Sugizo do in his solo career?
After Luna Sea went on break, Sugizo started his own solo career and opened the independent label Cross to produce other artists, as well as releasing his own records.
what was the name of the label Sugizo opened?
Cross
did Sugizo release any singles in his solo career?
On July 9, his debut single Lucifer was released
was Lucifer by Sugizo successful?
reached number 8 on the Oricon singles chart
did Sugizo do any touring in his solor career?
his first solo tour Abstract Day which lasted until the final performance in August at Akasaka Blitz
what other singles did Sugizo release after Lucifer?
on September 10 he released his second single, A Prayer
how did the A Prayer by Sugizo do? was A Prayer by Sugizo successful?
reached number 7 on the charts

Question: what other projjects did he do?
Self-contained rewrite: what other projjects did Sugizo do in his solo career?