J. Shanon Weaver is an American actor with extensive experience in voice acting for anime and video game English dubs, as well as in live-action film, television, and theatre. He holds a Bachelor of Arts in Theatre from the University of Texas at Austin and a Master of Fine Arts in Acting from the University of Georgia, also receiving conservatory training at the American Musical and Dramatic Academy in New York.

Weaver's career in anime voice acting began in the late 1990s and early 2000s, a period during which he voiced several prominent roles. One of his earliest and most significant roles was providing the English voice for the protagonist, Kenshin Himura, across multiple productions in the Rurouni Kenshin franchise. His credits for this character include the 1997 film Rurouni Kenshin: The Movie, the 1999 mini-series Rurouni Kenshin: Trust and Betrayal, the 2001 mini-series Rurouni Kenshin: Reflection, and the 2011-2012 mini-series Rurouni Kenshin: New Kyoto Arc. He also voiced the character Okita in Trust and Betrayal.

During the same era, he took on other significant anime roles. He played Ginji Amano in the television series GetBackers for 40 episodes from 2002 to 2003. He also had voice roles in the television series Final Fantasy: Unlimited as Kumo, and in Devil Lady as Satoru. In 2004, he voiced the character Monlyon in the English version of the animated film Blade of the Phantom Master, also known as Shin Angyo Onshi.

Beyond anime, Weaver's voice work extends to video games. He is credited in the popular game DC Universe Online, providing the voices for multiple characters including Captain Boomerang, Hush, Skeets, and Mr. Mxyzptlk. His on-screen acting credits include a role as Big Tex in the 2005 film Room. He has also maintained a career in theatre, appearing in numerous stage productions.

Weaver's recurring collaboration with the Rurouni Kenshin series, voicing the same character across different projects for over a decade, stands as a notable achievement in his voice acting career. He is also a writer and has narrated and produced several audiobooks. His academic and practical interests include integrating Eastern philosophy and Stoicism into modern acting techniques.