the song titled "Anything Goes! Ballad" was played during the finale of Kamen Rider OOO. Ohguro stated that she thought that the song would also work as a slow ballad, especially after she has been watching how the series has progressed, and recorded the song during her hiatus from releases. The balladic version was released as a single on December 7, 2011. Insert themes Each of the series' various insert themes are titled in such a way to resemble the Kamen Rider OOO Combo that they serve as the theme for. The songs also feature Akira Kushida, the voice for the OOO Driver, chanting the name of the combo throughout the song. Ayano, a session guitarist for many of the recent Kamen Rider Series songs and member of the "Tsuyoshi & Ayano" group from the Kamen Rider W radio show, performs guitars on all of the tracks. "Regret nothing ~Tighten Up~" Lyrics: Shoko Fujibayashi Composition & Arrangement: Shuhei Naruse Artist: Eiji Hino (Shu Watanabe) Episodes: 5, 7, 13 "Regret nothing ~Tighten Up~" was recorded throughout late September 2010 and recording completed on October 2, 2010. Shuhei Naruse was the song's producer and it was sung by Shu Watanabe under the name of his character Eiji Hino. It was first used in the October 3, 2010, episode. The pronunciation of "Tighten Up" is intended to mimic the pronunciation of "Tatoba". When played during scenes with other Combos, the "Tatoba" chant is removed from the song. The single for "Regret nothing ~Tighten Up~" features a ska arrangement by trombone player Eijiro Nakagawa. "Got to keep it real" Lyrics: Shoko Fujibayashi Composition & Arrangement: Shuhei Naruse Artist: Eiji Hino (Shu Watanabe) Episodes: 6, 16, Movie War Core The title of "Got to keep it real", Gatakiriba Combo's theme song, was revealed on Shu Watanabe's official blog on Gree.jp. The chorus features Sunaho of Labor Day. The single for "Got to keep it real" features a trance arrangement by Yoichi Sakai. "Ride on Right time" Lyrics: Shoko Fujibayashi Composition & Arrangement: Shuhei Naruse Artist: Eiji Hino (Shu Watanabe) Episodes: 9, 10, 15, 40, 42, 45 "Ride on Right time" is Latorartar Combo's theme song. The additional rap vocals are by Tsuyoshi Himura, the Tsuyoshi of "Tsuyoshi & Ayano". The single for "Ride on Right time" features a "mixture" arrangement by Shamo and Florida Keys member Junichi "Igao" Igarashi. "Sun goes up" Lyrics: Shoko Fujibayashi