 The martial arts sequence performed during the song "Lu:Na" was  choreographed by lead dancer Yosh and took months to rehearse.  Gackt, who already knew martial arts to a degree, had done similar  moves in the earlier film Moon Child, but many members of the  concert dance team were not used to such complex movements or  skilled in the handling of a katana (Japanese sword). The sequence  is made possible through the complicated stage design, which  features a number of trap doors used by Gackt to rapidly move about  the stage. However, the entire sequence is amazingly done without  the use of wires.