《忍者》的詞曲作者是山下達郎，演唱者是植村花菜。其完整的歌詞如下：
日文原版：
飛び立つわ 忍者
うそつき 忍者
どんな夢を 追いかけてるの
夢中なの 忍者
ひとつふたつ 無理しないで
あの娘を 守りたいの
なんだかんだ 言わないで
たぶん たぶん たぶん だれでも
忍者 忍者 忍者
忍者 忍者 忍者
忍者の歌 歌えば
たぶん たぶん たぶん だれでも
踴れば踴るままに
ぶっ飛ばす 運命（さだめ）だもん
（Go Fight Go） 時計裏返しならいざ決戦だ（必殺連發）
中に忍び込む 諜報員
突如の不審船舶 時計裏の操は噓だらけ（操刀斬り込み）
きっちゃきれそうだわね （動くの待ってて）なかなりそう言われたもん（波に消える）
思い切り聲をかすめて わざと ああ 一度もじゃなかったもん （バチバチ打ち突破）
つぎにするわさ 一回おしえるなら（銃聲爆発）最後の絶対秘策 （玉をそろえる）武器振り上げろ 猛�� ат軍軍歌熱唱しては後夜祭
英文翻唱版：
Hideki Tanada original version lyrics: Rinjiroh Ogasawra (translator: Arno Wu) English version lyrics: Jay Chou (translator: Arno Wu) (not in the original version) “Ninjia” (singer: MissA, translator: Jay Chou) English version translation: Jay Chou) 僕らは忍者(Oh yeah!) 我們就是忍者(Oh yeah!) We are ninjas! (Oh yeah!) We are ninjas! (Oh yeah!) Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah! (Let’s go!) 我們一起唱著這首歌 Hey hey hey Hey hey hey Hey hey hey Oh no oh oh oh Oh no oh oh oh Let’s go!(Verse1) Oh! Run, we are ninjas Running around and sneaking in Slip in, out of, up and down Trying to find that sweet thing Flying high like a dragonfly Like a cloud drifting away Or so they think they know me But they don’t know what I’m capable of See the stars in my eyes? I’m a star, a shooting star I’m a star, a shooting star (Chorus) We are ninjas, we are ninjas The world is our playground The world is our playground The world is our playground The world is our playground The way we move is our dance We dance through the day and the night The way we move is our dance (Verse2) It’s time to let loose, no more hiding Let loose, run free Let loose, run free, we are ninjas, ninjas Run free, we are ninjas, ninjas (Chorus) Run, we are ninjas Running around and sneaking in Slip in, out of, up and down Trying to find that sweet thing Slip in, out of, up and down Slip in, out of, up and down Trying to find that sweet thing Oh no oh oh oh Oh no oh oh oh Hey hey hey Hey hey hey Hey hey hey Hey hey hey Hey hey hey Hey hey hey Hey hey hey Hey hey hey Hey hey Hey hey Hey hey Hey yeah! (Outro) Run, we are ninjas Running around and sneaking in Slip in, out of, up and down Trying to find that sweet thing We are ninjas! We are ninjas! We are ninjas! We are ninjas! We are ninjas! We are ninjas! We are ninjas! We are ninjas! We are ninjas! We are ninjas! We are ninjas! (End) (Translation by Arno Wu)