Just so you know, since its all in Japanese...
The letter that they open says:
"I'm coming soon.
-Zombie"
& the kid get mad at the guy with the microphone and says:
"You're not helping at all! What are you talking about?"
Then when the zombie had him trapped he sid something along the lines of:
"you fool you have nothing on me. You're deadmeat zombie"
but I wish someone that spoke japanese would subtitle the video and re-post it.