Nami Tamaki’s cover of Mobile Suit Gundam III: Encounters in Space – Encounters.
Her CD of Gundam cover music can be found on Amazon: http://amzn.com/B00JVN2EOC
The original cut of the trailer featuring the original version of the song can be found here: https://youtu.be/-bnGU-DMWeM
Enjoy!
MAG.MOE - The MAG, The MOE.