Who is the singer of "Future Star"?

Question

Regarding "Future Star" song:

1. Is it right that Kuriyama Mirai or Risa Taneda really sing "Future Star" in Kyoukai no Kanata anime by herself (and Nase Mitsuki of course)? Or somebody else did it?
2. Have they performed the dance in the live show at a concert too?

Answer 1

Yes, it's true. The voice actors (Risa Taneda, Minori Chihara, and Yuri Yamaoka) themselves sing "Future Star". I mean, the voice even matches in the song and the voice acting of anime.

If you're still skeptical, refer the source below:

• VGMdb - Beyond the Melodies
• Wikia - Kyoukai no Kanata Original Soundtrack "Beyond the Melodies"
• Wikia - Yakusoku no Kizuna

Also, I am pretty sure voice actors weren't the one dancing in the live show concert. They were some cosplay artists.