OK
Where to start :
LOVED THE PART ABOUT WRITING ON THE WALL!!! Hilarious!!! had me lauhing so much I had to watch your movie a second time to get over it!.
*Japanese people will not prefer to take you to a western restraunt. We would prefer to take a foreign person to a japanese restraunt. Aspecialy if they havn't been to japan before.
*Soy sauce isn't allowed on rice : Where on earth did you hear this? What about tendon? Personally I love a bit of sashimi soy sauce on my rice. Takes the blandness off it.
To cut it short: A lot of your facts sound like they were taught to you by a school teacher rather than real people. And there is a big difference. Nice work though! Great comedy!