Mano Erina's Keyboard

Do you know what type of her keyboard? how much price is that? etc.

now, i'll tell you all what is exacly that...

Its Yamaha P-155



From Yamaha:

Whether you're practicing at home or away, performing solo or in a band, the Yamaha P-155 digital piano offers professional quality sound with our legendary piano touch. Thanks to the top-shelf Yamaha digital piano technologies like advanced sampling methods and the ultra-expressive GH (Graded Hammer) keyboard, musicians don't have to choose between portability and piano quality—the quality you expect from a company that's been building world-class acoustic pianos for over a century. In the P-155, Yamaha crafts that heritage into a slim cabinet available in three contemporary finishes.

its nice keyboard.
This Keyboard appeared in Hajimete no Keiken (PV), Haru no Arashi (PV), and all Mano Erina's concert.