Goro is a former Olympic gold medalist for Judo. He participated in Japan's mixed martial arts tournament to determine the members for the country's King of Fighters team. Although he got far into the finals, he lost against Kyo and was bumped to third place. A year later, he entered the 1994 King of Fighters tournament with Benimaru and Kyo. He eventually befriends his teammates and continues to enter with them.
On the day before the 1997 tournament, his mentor begged him to return to his professional Judo career. Goro agreed to follow his request after he finished his participation in the year's King of Fighters tournament. As was promised, he returns to the Judo circles and brings fame back to Japan. During his absence from the King of Fighters tournament, he finally married and fathered a son. Goro also became the mentor of his own dojo.