Gackt-тің "Diabolos" альбомы: Ай легендасы және қараңғылық саяхаты

Diabolos is the sixth full length studio album released by Japanese solo artist Gackt on September 21, 2005 in Japan, and on October 26, 2007, in eighteen countries across Europe. As a concept album, it is a sequel entrant to the "Moon Saga" found in the eighth studio album Last Moon and theatre play Mysteries of Yoshitsune I&II, as well prequel to his third and fourth studio albums, Moon and Crescent, the film Moon Child, and novel Moon Child Requiem.

In April 2005, with the release of the album's first single "Black Stone", was the turning point from compilation and unplugged themed albums in 2004 and early 2005, to alternative rock and continuation of "Moon Saga" from the fourth album Crescent in 2003. The name of the album doesn't literally symbolize Latin diabolus, but the darkness in human's heart, which is shown through the characters of the story. The album cover represents a person "taking off the mask", realizing another part of himself inside which is dark and evil. The previous work covered the fourth chapter, while Diabolos in between the second and third chapter, The whole story is set in both Europe and Asia (mostly Japan), depending on the story and meaning wanted to be expressed. The songs on the album, although conceptually related, are independent from each other, and sold over 100,000 copies, being certified Gold by the RIAJ. Preceding the album release, were released three singles, "Black Stone", "Metamorphoze" and "Todokanai Ai to Shitteita no ni Osaekirezu ni Aishitsuzuketa ". The first single "Black Stone" reached number three on the second counting week of May, with sales of 42,712 copies. In the upcoming week, it was at number thirteen, with sales of 11,212 copies. It charted for 7 weeks, and sold over 100,000 copies, being certified Gold by RIAJ. The second single "Metamorphoze" reached number two on the first counting week of June, with sales of 90,588 copies. In the upcoming two weeks, it was at number seven and seventeen, with sales of 31,169 and 14,052 copies. It charted for 13 weeks,

The third single "Todokanai Ai to Shitteita no ni Osaekirezu ni Aishitsuzuketa " reached number three on the fourth counting week of August, with sales of 38,910 copies. In the upcoming week, it was at number fourteen, with sales of 13,669 copies. It charted for 9 weeks,

On September 23, 2005, Gackt went on a, at the time, his longest nationwide tour Diabolos ~Aien no Shi~ at Toda, Saitama, Japan. There were held 36 concerts in 26 cities across Japan, and included entering the arena on a horseback in full gallop, in a suspended coffin during "Lust for Blood", singing hanging 20m in the air, and disappearing in a sudden smoke explosion. In 2006, the tour was continued with a concert on January 14, in Korea, at Fencing Stadium in Korean Olympic Park, which was his first Asian solo concert.