Sgt. Frog season 4

The fourth season of the Sgt. Frog anime series consists of the fifty-one episodes after episode one-hundred-and-fifty-four from the series, which first aired in Japan from April 7, 2007, to March 29, 2008, on TV Tokyo. Season 4 uses 5 songs: 2 Openings and 3 Endings. "Kaettekita Kero! tto March" (帰ってきたケロッ!とマーチ) by Ichirō Zaitsu & Yuko Ogura is used as the opening from episode 155 to 183. "Fundari Kettari" (フンダリーケッタリー) by Dylan & Catherine is used as the opening from episode 184 to 205. "Kurutto, Mawatte, Ikkaiten" (くるっと•まわって•いっかいてん) by Kigurumi is used as the ending from episode 155 to 168. "Niko Niko Champ" (ニコニコチャンプ) by Non Style is used as the ending from episode 169 to 192. "Kero Neko no Tango" (ケロ猫のタンゴ) by Osamu Minagawa & Hibari Children Chorus is used as the ending from episode 193 to 205.