Yuya Fungami is a minor character introduced in JoJo's Bizarre Adventure - Part 4: Diamond is Unbreakable. Yuya is introduced as an antagonist in Highway Star and later becomes an ally in Enigma Boy. Yuya is a motorcycle gang member who was made into a Stand User by Yoshihiro Kira and was then prompted into attacking the Joestar Group. He lures Rohan Kishibe into a trap and later pursues Josuke in a high-speed road chase with his Highway Star. Yuya later assists Josuke and Koichi as an ally and friend in the fight against Terunosuke.

Yuya's Stand is called "Highway Star", which has the ability to track targets at a speed of 60 km/h in order to efficiently absorb their vitality. Highway Star enables Yuya to heal from injuries at a significantly faster pace. Yuya himself has a keen sense of smell and can identify emotions of others based on their chemical scents.