One of the must do highlights for me during my recent Japan tour was to go to and eat at Kaiju Sakaba which is an Ultraman themed restaurant. Words, pictures nor video can properly explain this place and the only way to get the full experience is to go for yourself (which might be difficult to do since the restaurant was only scheduled to be opened for 1 year and closes in the next month or two). The restaurants entire decor is of course Ultraman / Kaiju themed from the booths to the display cases, the monitors showing episodes of Ultraman and even the food and drink menu are Kaiju specialties. There is even a souvenir shop to purchase figures, plates and other collectibles.
Because of the dim lighting it was rather difficult to get good pictures but like I said, it's a place that you need to experience first hand to get the full experience.