Ginpei Sato is a Japanese voice actor and actor born on October 19, 1977, in Tokyo, Japan. He began his career in the entertainment industry after withdrawing from Gakushuin University and founding a theatre troupe named Suspendds. His father is the actor Sato Bunsaku. Sato has been active in voice acting since approximately 2004, contributing to a range of anime series and video games.

He is widely recognized for two prominent roles from the mid-2000s. He provided the voice of the ronin Jin in the acclaimed 2004 anime television series Samurai Champloo. He also voiced Saïx, a key member of Organization XIII, in the popular Kingdom Hearts video game franchise, beginning with Kingdom Hearts II and reprising the role in subsequent titles such as Kingdom Hearts 358/2 Days and Kingdom Hearts III.

In addition to these signature roles, Sato's voice acting portfolio includes a variety of other characters. He voiced the character Shun in the 2006 original net animation Be Rockin'. His other anime credits include playing Hirayama Yukio in Akagi, a Turk known as Two Guns in Last Order: Final Fantasy VII, Rig in Claymore, and Yousuke in Welcome to Irabu's Office. Beyond anime, his work as a voice actor in video games includes the role of Isa in Kingdom Hearts Birth by Sleep.

Sato has also worked as an on-screen actor, appearing in several Japanese television dramas. His live-action credits include roles in the long-running series Water Margin, The Seven Women Lawyers, The Way of the House, and Hanzawa Naoki. He is also credited with a role in the 2011 animated film The Temperature of the Cherry Blossom.