Ryūō

Ryūō (Japanese 龍王 or 竜王, lit. "Dragon King") may refer to:

• Ryūō, Shiga, a town in Gamō District, Shiga, Japan.
• Ryūō, Yamanashi, a former town in Nakakoma District, Yamanashi, Japan.
• Ryu-oh (Ryūō), a title and tournament in Japanese professional shogi.
• Ryūō Noboru, a former sumo wrestler.
• The royal tree and spaceship of princess Ayeka Masaki Jurai from Masaki Kajishima's Tenchi Muyo! Ryo-Ohki. ("龍王" is spelled "Ryu-Oh" in the English manga)