Fumio Yoshioka is a Japanese voice actor born on July 31, 1965 in Bunkyo, Tokyo, Japan. He is known for a limited but notable body of voice work in anime during the late 1990s and early 2000s. Yoshioka is most recognized for providing the voice of the character Masaki, also known as Masaki Andoh, in the 1999 anime television series Cybuster. In this series, which is loosely affiliated with the Super Robot Wars franchise, his character is a mystery man piloting the titular Cybuster mecha. He is credited as the Japanese voice actor for this role across multiple databases and industry listings.

Following his work on Cybuster, Yoshioka's voice acting career includes a role in the 2001 anime X战记, where he voiced a student. Available documentation indicates these two roles represent the extent of his publicly listed voice acting credits. In the course of his work, he collaborated with actor杉田智和 on at least two projects. Professional records list his affiliated agency as Aksent. Information regarding specific awards, significant recurring collaborations beyond individual titles, or further notable achievements is not available in the existing records.