Announcer Yoshigai provides play-by-play commentary for wrestling matches across the Kinnikuman franchise and its sequel series. His character design received notable revisions in the original anime adaptation while preserving his core announcing duties.

The character draws direct inspiration from Yudetamago's real-world neighbor, Yoshio Yoshigai. During the Kinnikuman: Scramble for the Throne storyline, Announcer Sekiguchi temporarily assumed his role.

Yoshigai debuted in the original series' 20th Choujin Olympics arc alongside color commentator Tazahama, upholding a professional broadcast demeanor despite Tazahama's comedic interruptions. This dynamic persisted into the 21st Choujin Olympics arc, where Yoshigai continued as lead announcer while navigating Tazahama's antics.

Throughout the sequel series—marketed internationally as Ultimate Muscle—Yoshigai maintains his announcing position but partners with the eccentric new commentator Nakano. His role adapts to Nakano's unpredictable behavior during broadcasts, yet he remains a fixture for major wrestling events franchise-wide.