Tomisaburou Horikoshi is a Japanese actor and voice actor born on June 2, 1954, in Gunma Prefecture, Japan. He is a graduate of the Tama Art University drama department. Throughout his career, he has been affiliated with several theater companies and agencies, including the theater group Kaze and Office Tree, and is currently represented by Production Tanc.

Horikoshi's voice acting career includes a wide range of supporting roles in anime television series, films, and dubbed foreign productions. One of his earlier notable appearances was in 2014, voicing Rokusuke's father in the acclaimed series Mushishi: The Next Chapter. He has been a consistent presence in the long-running Lupin III franchise, taking on various roles such as Tony and a priest in Lupin the Third: Part IV in 2015, a chief in Lupin the Third: The Italian Game in 2016, and the High Priest in Lupin the Third: Part 5 in 2018, a role specified in the query. His film work within the franchise includes a cameo as a party guest in Lupin the III: The First in 2019.

In 2017, Horikoshi voiced Father Joseph Connotry in the mystery anime Vatican Miracle Examiner. The same year, he also voiced the character Wan in The Journey Home, as noted in the query. Other significant roles from that period include the Island's Grandfather in Sakura Quest, Shimada's grandfather in March comes in like a lion, and a coach in Yuri!!! on Ice. His film appearances also include voicing Daichi Tani in the 2017 and 2018 Godzilla anime films, Godzilla: Planet of the Monsters and Godzilla: The Planet Eater.

Horikoshi's career demonstrates recurring collaborations with certain franchises beyond Lupin III. He voiced Casel in both seasons of GATE in 2015 and 2016, and has had roles in multiple Gintama series installments. He also contributed to the Japanese dub of the animated series Castlevania, voicing the Archbishop. His professional profile notes a range of special skills, including traditional Japanese dance, modern ballet, and sports like baseball and squash. He continues to work steadily, with roles in more recent series such as Kingdom in 2021 and 2022.