Well what do you know, Shinya Arino DID play Rockman 9.
As pointed out by WanderingMind, a special episode of GameCenter CX focused entirely on Rockman 9 was once featured on the Japanese Nintendo Channel. The original video is long gone from the service but thankfully, we have the magic of the internet:
Watch gccx rockman9 (Megaman9)Vol.1 in Gaming | View More Free Videos Online at Veoh.com
Watch gccx rockman9 (Megaman9)Vol.2 in Gaming | View More Free Videos Online at Veoh.com