Listen to it. It's from the Katanagatari OST (you can listen to it on that video site).

Song #12, DUB TRIP. Tell me, does that sound exactly like something from Ga-Koro on the MNOG?

Iwasaki Taku, you are the man.

(I'm having this weird obsession with the old Bionicle music lately, in case you're wondering why the heck I would mention an anime OST)