Hirano Aya is doing CM for Denny's the family restaurant.

Denny's page featuring Aya :
http://www.dennys.jp/dny/menu/dennys/season/index.html

Denny's page with Aya's voice CM (click the Start button) :
http://www.dennys.jp/dny/marche/index.html

Denny's TV CM featuring Aya (you can select 1080p HD)
http://www.youtube.com/watch?v=1_XAkfPE8Bg

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'CuSO4' Yung