Toshihide Tsuchiya is a Japanese voice actor affiliated with the agency Arts Vision. He was born on November 11 in Tokyo, Japan. Tsuchiya is a graduate of the Japan Narration Acting Institute.

Tsuchiya's career includes a range of supporting roles in anime, video games, and foreign film dubbing. An early role was in the 1999 television anime series "Sorcerous Stabber Orphen," where he voiced a character. In the same year, he was part of the cast for the anime "Seraphim Call". His work in the late 1990s and early 2000s also included roles in "Seihō Tenshi Angel Rinks" and "Jibaku-kun". For the 1999 film "There's Something About Mary," he contributed to the Japanese dub.

Throughout the 2000s, Tsuchiya continued to build his portfolio with diverse roles. He voiced characters in series such as "Super Gals!" in 2001, "Witch Hunter Robin" in 2002, and "Midori Days" in 2004. His work in video games includes roles in "Zone of the Enders" in 2001, "Galarians" in 2002, and "Shikigami no Shiro II" in 2003.

A significant and prominent role in Tsuchiya's career is that of Mash, one of the Black Tri-Stars, in the "Mobile Suit Gundam: The Origin" series. He voiced the character across multiple episodes, including "Mobile Suit Gundam: The Origin II: Artesia's Sorrow" in 2015, "Mobile Suit Gundam: The Origin IV: Eve of Destiny" in 2016, "Mobile Suit Gundam: The Origin V: Clash at Loum" in 2017, and "Mobile Suit Gundam: The Origin VI: Rise of the Red Comet" in 2018. His involvement with the franchise included participating in promotional events, such as a stage greeting for "The Origin IV" alongside his castmates who played the other Black Tri-Stars, Kazuya Ichijo and Kenichirou Matsuda. At this event, he shared an anecdote about his excitement upon learning he had passed the audition, initially wondering if he had landed a lead role like Amuro or Char. The three actors noted that they approached their performance of the mobile suit battle scenes with the physicality of a hand-to-hand combat scene, aiming to become the mobile suit itself.

Beyond the Gundam franchise, Tsuchiya has been involved in other notable projects. His other voice roles include Eurys in "Appleseed XIII: Tartaros & Ouranos" and Theo in the series "Sora o Miageru Shōjo no Hitomi ni Utsuru Sekai". His filmography also lists voice work for the anime "Silk Road Boy Yuto" in 2006. Tsuchiya's personal interests include playing tennis, guitar, and golf, as well as practicing calligraphy.