Based on a Japanese manga series written and illustrated by Mari Yamazaki. It won the third Manga Taisho and the Short Story Award at the 14th Tezuka Osamu Cultural Prize.
Filming began April 6, 2013. Shooting will take place at Nu Boyana Film Studios in Sofia, Bulgaria, Cinecittà film studio in Rome, Italy, and a hot spring in Japan. "Thermae Romae II" is thought to be the first Japanese film to shoot in Bulgaria. An estimated 5,000 foreign extras are participating in the filming of "Thermae Romae II" in Bulgaria.