At Teppan Edo you sit at tables which surround the Teppan grill. Each table is for 8 people. There is no ability to add any more.
In my opinion, even if you were seated at 2 adjacent tables, the way they are situated you really wouldn't be able to easily interact between the 2 tables.
If this is a problem for your group for this one dinner, I would suggest a different restaurant.
Have a Great Trip