No, the Japanese "I'm a Mac" ads do not include Hello Kitty, Pikachu, or anything with tentacles. But they're quite funny in their own right, if only because I have absolutely no idea what the actors are saying in them but can still pretty much grasp the message that they're trying to convey. It's interesting, too, to see how the Japanese ads are much more reliant on physical expressions and gags, whereas the British Mac ads that Candace blogged here a few days ago are all about the wit (not surprisingly).
Additionally, I am of the opinion that the Japanese "Mac," like the British one, is much cuter than Justin Long of the American ads (and Dodgeball: A True Underdog Story fame).
P.S.: One member of our team, whom I will allow to remain anonymous, commented that he "can't wait till someone does one in Klingon."