* NightmareFuel: [[https://www.youtube.com/watch?v=CGAzBm8_QZ8 Joubutsu2000]]. The lyrics itself are about [[spoiler: a man giving up and gaining peace before his death]]. Hear a woman speaking 'Trois', 'Sept', 'Cinq', 'Six', 'Quatr'? "3,7,5,6,4" in japanese sounds like 皆殺し, which means [[spoiler: "kill everyone"]]. That crackling noise near the end? It's the sound of an [[spoiler: incinerator, like those you see in a mortuary]].
* TastesLikeDiabetes: Once you reach the apex of a song, your little drum character starts dancing "The Monkey"... and it's absolutely ''adorable''!
* ThatOneBoss: Any song with a difficuty rating of 10 stars defines this trope. And any song above 7 stars in Oni level will cause an acute onset of DS Throwing Syndrome.