Nao Ōmori is a Japanese actor born in Tokyo on February 19, 1972, who has built a diverse career in both live-action and voice performance for anime and film. While he is widely recognized for his work in live-action cinema, including a Best Supporting Actor award at the 2004 Yokohama Film Festival, his voice acting roles have appeared in several notable animated projects.

In the realm of voice acting, Ōmori has taken on a variety of supporting roles in feature films. He voiced the character of Akio Kazama, the adoptive father of one of the lead characters, in Studio Ghibli's 2011 animated drama From Up on Poppy Hill. His film voice credits also include the role of Haruka's Father in the 2009 Japanese computer-animated fantasy film Oblivion Island: Haruka and the Magic Mirror. The actor's work extends to the 2023 superhero film Shin Kamen Rider, where he provided the voice for the character Spider Aug.

Beyond anime films, Ōmori has contributed to other media as a voice actor. He provided the Japanese voice for the character Tsuneo Iwami in the 2016 video game Yakuza 6: The Song of Life. His career is further distinguished by his family connections to the entertainment industry, as he is the son of actor Akaji Maro and the younger brother of film director Tatsushi Ōmori.