
Quick answer — Shinya Fukumatsu voices Piast in Orb: On the Movements of the Earth, Saibankan in JoJo's Bizarre Adventure: STONE OCEAN, Mark Vix in ASTRA LOST IN SPACE and 8 more characters.
Shinya Fukumatsu voices Piast (Orb: On the Movements of the Earth), Saibankan (JoJo's Bizarre Adventure: STONE OCEAN), Mark Vix (ASTRA LOST IN SPACE), Jii (Patema Inverted), Taizo Nanaumi (Rising Impact), Willem (Campfire Cooking in Another World with my Absurd Skill), Iguana-sensei (Train to the End of the World), Sosuke Abayama (Blade of the Immortal (ONA)) and 3 more.
Piast is voiced in Japanese by Shinya Fukumatsu.