Jirō Satō is a Japanese actor and voice actor known for his extensive work in live-action film and television, as well as his distinctive supporting roles in anime. Born on May 7, 1969, in Aichi Prefecture, Japan, his career is marked by a high volume of character roles, often portraying eccentric, comedic, or antagonistic figures.

Sato is particularly recognized for his frequent collaborations with director Yuichi Fukuda, appearing in many of his comedic works. His filmography includes a mix of live-action adaptations of popular manga and original productions. Notable live-action roles include Henpeita Takechi in the 2017 film adaptation of Gintama, Kanzō Mogi in the 2015 live-action television series Death Note, and Danjūrō Namakubi in Abashiri Ikka The Movie. He also portrayed Majime Kamen in the live-action film HK/Hentai Kamen, Hosaku Yajima in the live-action series Gokusen, and Manager Fumihito Kuroki in Densha Otoko.

In the field of voice acting for animation, Jirō Satō provided the voice for Flanagan in the 2017 animated film Mary and The Witch's Flower. His other anime voice credits include Noboru Kamikawa in the sports series Cross Game and a role in the series Shikizakura. His work as a voice actor often sees him playing authority figures or background characters, adding depth to the casts of major productions.

His career is defined by versatility and a strong presence in supporting roles across both live-action and animated media, making him a familiar face and voice to Japanese audiences.