I'm glad they don't offer the typical kids stuff, it forced my picky DS to try the food and he actually liked it.... he does like grilled chicken and steak. I did take ketchup to the restaurant as I knew this would help.
We always tell DS to try something and if he really doesn't like it we will get him something else later.... or we frequently give him a yogurt or fruit before we go to a restaurant so he has had something healthy before hand. And I usually carry peanut butter so he can have that on a roll or bread although that trick won't help at Teppanyaki!
We had a great meal there and both my kids really enjoyed the experience.