Shoujyo (An Adolescent) (below) the first film directed by Japanese actor Eiji Okuda, won the top prize at the 17th annual Paris Film Festival (April 1-9).
Mayu Ozawa who debuted as an actress in the film, also received the best actress award at the event.
The film, based on the novel by Mikihiko Renjo, tells the story of a love affair between a 15-year-old girl (Ozawa) and an ageing policeman, played by Eiji Okuda.
The public prize, worth Euros37,000 in advertising space, was awarded to Romanian director Nae Caranfil's Philanthropique.
A press jury awarded its prize - and Euros122,000 of advertising space - to Marco Bechis festival regular Sons And Daughters (Figli/Hijos).
Vuk Kostic was named best actor for his role in Absolute Hundred.