A Japanese voice actor for NANAMI KENTO in Jujutsu Kaisen is Tsuda Kenjiro who played Kaiba Seto in YU-GI-OH! and Inui Sadaharu in the Prince of Tennis.
He has a cool law tone voice and frequently performs quiet and cool characters.
Here’s the video in which you can hear him play up to 41 anime characters including Nanami Kento!
Here’s another video in which you can see Tsuda Kenjiro himself. He’s a nice guy like his voice!