According to Oricon, a live event of Gintama
was announced to be held from March 20th - May 16th at an amusement park Namco Namja Town.
Picture of Special Gintama Menu
Among the comical menus associated with Gintama characters, Hijikata's favorite food "Mayonnaise on the Bowl of Rice" and Gintoki's favorite "Sweet Red Beans on the Bowl of Rice" will also be served. Arguments over the pros and the cons of these menu arose in the gintama fandom like "This is quite Gintama-style." and "Real reproduction is not what we want."
Source: Oricon Gourmet