Template:ultra soul Song
Undoubtedly an unparalleled success in the B'z catalogue, "ultra soul" is routinely voted the top B'z song in polls involving the general public, including during the Music Station B'z 25th Anniversary Special. The song has been performed over 300 times in the first decade and a half since its original release. Its lyrics are rooted in athletics and the inherent determination and work ethic required as central themes, in accordance with the song serving as the theme to numerous swimming competitions. The tribulations of difficult training and great rewards that await are voiced directly in the lyrics, which has made the song an inspirational choice not just for athletes but students as well. During live performances from 2002 onward, it is customary for Koshi to make his way to Tak during the final bridge in order for Tak to shout "Hey!" into the microphone, while audience members and the band jump during the "urutora soul, hey!" moments of the chorus and outro.