Fun Fact: I listened to some Licensed Songs during the final four boss fights, I tried to make them fit the scene as best as could. From the Top...

Akiyama Vs. Arai: "Dancing With Myself" by Billy Idol
Saejima Vs. Kido: :Check Yo Self" by Ice Cube
Kiryu Vs. Daigo: "IFLOVEYOU" By Big Black Delta
Tanimura Vs. Munakata:"I will Dare" By The Replacements