The title is a versus fighting game, pitting the player against other martial artists in a great tournament known as the Budokan at the Nippon Budokan in Tokyo.
"Wikipedia"
This was their first performance at Nippon Budokan on September 23, 2007.
"Wikipedia"
After the fan club tour, the band then announced a new single and live tour, which was called Tour 10 Nameless Liberty Six Bullets starting in July with two consecutive nights at Nippon Budokan.
"Wikipedia"