Dr. Tsuchiya leads the Tsuchiya Racing Factory as a visionary developer of Mini 4WD technology. His engineering philosophy, rooted in a childhood fascination with jet planes, shaped the groundbreaking Super Avante prototype—a design that evolved into the Saber series. To test its potential, he entrusted young racers Retsu and Go Seiba with piloting the prototype in competitions, demanding victories to validate its prowess.

A rivalry with Dr. Ōgami defines his professional journey. While Ōgami champions destructive "battle racing," Tsuchiya prioritizes technical precision and integrity, deploying creations like the Sonic Saber and Magnum Saber to counter weaponized adversaries. Their ideological conflict fuels both technological advancement and narrative stakes.

As director of the TRF Victorys during the World Grand Prix, he combines strategic oversight with hands-on mentorship, supported by a laboratory blending aeronautical engineering principles with Mini 4WD innovation. His dual expertise in jet propulsion and chassis design underpins the facility’s advanced research.

Beyond racing, he steers protégés toward broader horizons: Retsu transitions to space development under his recommendation, while Go pursues professional motorsports. Tsuchiya’s legacy endures through Tsubasa, a next-generation racer trained by Go, who inherits the Magnum series lineage.

Consistently clad in a green shirt, dark-blue tie, lab coat, and square glasses, his analytical yet paternal presence anchors races as both commentator and ethical guide, challenging the Mini 4WD world to prioritize progress over destruction.