Paris expo - Porte de Versailles
1 Place de la Porte de Versailles
Hall 3
75015 Paris

From the official event website:

“Paris Manga & Sci-Fi Show is the first Parisian pop culture festival! We are committed to sharing our passions with our visitors on a wide variety of themes: Japanese culture and traditions, comics, video games, cinema, television series, web culture, manga, Japanese animation, cosplay martial arts and many other things.”

Full details available at the Paris Manga Sci-Fi Show website.