Board Thread:Questions and Answers/@comment-4946341-20150320100454/@comment-5051846-20150425143152

That sounds like a real voice with heavy autotune applied. O: That settles the issue for me. If they haven't outright said she's a Vocaloid, it's unlikely she uses the software. Usually they announce the engine straight away, if it uses one.

Animated idols with real voices are not uncommon in Japan.