Tatsuya Fujiwara (藤原 竜也, Fujiwara Tatsuya?, born May 15, 1982 in Saitama, Japan) is a Japanese actor.
He is famous for acting the part of Shuya Nanahara in the controversial 2000 film Battle Royale and continues the character as a leader of the Wild Seven in the sequel, Battle Royale II: Requiem. He stars as Light Yagami, the leading role in Death Note and Death Note: The Last Name, films based on the manga of the same name. He is a Seibu Lions fan. He has also worked with director Takashi Miike for Sabu. In theatrical works, he is known for collaborating with Yukio Ninagawa, one of the most influential directors in Japan. He started his career in theatre, before screen debut, with the title role of Shintoku-maru, the boy who has an obsessive relationship with his step mother. He has also acted in Shakespeare plays, including Hamlet and Romeo and Juliet.