Arata Nagai (長井 新, Nagai Arata, October 3, 1997) is a Japanese voice actor from Hyogo Prefecture. He is affiliated with the talent agency M&I.

He graduated from the Mausu Promotion Actor Training Center. On January 1, 2021, he joined M&I and changed the reading of his name from Shin Nagai to Arata Nagai. In 2021, he played his first main role as Kimihiko Kimizuka in the anime The Detective is Already Dead.