Hotaru no Hikari
- Type: Movies
- in Theaters on 9th June 2012
- Produced by: "Thermae Romae" Production Committee
- Director: Hiroshi Yoshino
- Based on: Comic "Hotaru no Hikari" by Satoru Hiura
- Writer: Fumie Mizuhashi
- Starring: Haruka Ayase, Naohito Fujiki and others
- Location: Rome, Italy and other cities