Because, really, why the heck not?
Obviously, this is more interesting if you understand Japanese, but the refrain is in English, so there's that. The whole thing is rather charming.
ドラゴンボール芸人 ガチラップ Battleful Days [RYU@YouTube]
To contact the author of this post, write to bashcraftATkotaku.com or find him on Twitter @Brian_Ashcraft.
Kotaku East is your slice of Asian internet culture, bringing you the latest talking points from Japan, Korea, China and beyond. Tune in every morning from 4am to 8am.