What is dominoes hatsune miku?

Dominoes Hatsune Miku is a special collaboration between the famous pizza chain Domino's and the virtual pop star Hatsune Miku. Domino's ran a campaign where customers could order a special meal deal that featured Miku as the spokesperson, and included a limited edition Pizza Hut x Hatsune Miku box, a Hatsune Miku keychain, and a limited edition voucher for Miku's smartphone game. The campaign was a success and helped to further promote Hatsune Miku's popularity in Japan.