Sōji Yoshikawa

Dr. Sōji Yoshikawa is a human in the Generation 1 continuity

Dr. Sōji Yoshikawa (吉川惣司) works at Shibuya Manufacturing (渋谷電気工業製作所). After Kremzeek trashed his company, he helped the Autobots defeat Kremzeek.

Fiction

Animated continuity

Voice Actor: Walker Edmiston (US), Kenyū Horiuchi (Japan)

Kiss Players continuity

Dr. Yoshikawa went on to breed Kremzeeks in captivity and created the Yoshikawa Type 5 Auto-Kremzeek Launcher for the Earth Defense Command. The weapon is wielded by Autrooper units and fires a ceramic shell that shatters on impact, unleashing the Kremzeek inside to absorb the electrical energy of any mechanoid it strikes.

From Teletraan I: The Transformers Wiki, a Wikia wiki.