It's Me, It's Me! (2013)

Hitoshi Nagano (Kazuya Kamenashi), who works at an electronics store, picks up a cellphone left behind by a customer and goes about a scam. He calls the person's mother and pretends to be her son. He then gets the mother to transfer money to his bank account. Soon, Hitoshi gets a lot more than he bargained for. (Asian Wiki)
Cast and Information
Directed By: Satoshi Miki
Written By: Satoshi Miki
Starring: Ryo Kase, Keiko Takahashi, Ryô Iwamatsu, Kiyohiko Shibukawa, Yoshiyuki Morishita, Midoriko Kimura, Eri Fuse, Yuki Uchida, Kazuya Kamenashi, Kinako Kobayashi, Ryû Nakatani, Yûsuke Shôji
Genres: Comedy, Drama, Sci-fi, Suspense/Thriller
AKA: Ore Ore
Country: Japan