The vocals you hear performed by the anime singer featured in this Japanese TV commercial for Toyota were completely computer-generated:
Production music creators can generate vocal tracks like this by just entering pitches and text into a software program called Vocaloid, originally developed by Yamaha. The software is modular wherein the user buys one “Vocalist” at a time. Here’s a mind-blowing demo of the most recent “Vocalist” called Tonio (distributed by Zero-G for $149.99 USD) singing Donizetti’s Una Furtiva Lagrima:
Mike Bielenberg is a professional musician and co-founder of http://www.musicrevolution.com, a production music marketplace where media producers and business owners can license high-quality, affordable music from a online community of musicians.