is a Japanese masculine given name and family name meaning "dragon", "noble", "prosperous", or "flow". Ryū, Ryu, or ryu may also refer to:
Fiction Ryū (manga), a 1986 series by Masao Yajima and Akira Oze , a 1919 book by Ryūnosuke Akutagawa Monthly Comic Ryū, a manga magazine in Japan
Characters Ryu (Breath of Fire), the protagonist in the Breath of Fire series Ryu (Street Fighter), a leading character in the Street Fighter franchise Ryū Daikōji, a character from Little Battlers Experience Ryu Hayabusa, the protagonist in the Ninja Gaiden series Ryu Higashi, a character from J.A.K.Q. Dengekitai Ryu Jose, a character from Mobile Suit Gundam Ryu Kumon, a minor character in Ranma 1/2 Ryu Nakanishi, Science Ninja Team member G-5 Ryu Tanaka, a character from Haikyuu!! Ryu Tendoh, a character from Choujin Sentai Jetman Ryū Tsuji, a character from Special A "Wooden Sword" Ryu, a Shaman King character A character from Fist of the North Star
People Chishū Ryū (笠 智衆, 1904–1993), Japanese actor Hirofumi Ryu (笠 浩史, born 1965), Japanese politician Ryu Fujisaki (藤崎 竜, born 1971), Japanese manga artist Ryu Lee, an alternate ring name of the Mexican wrestler Dragon Lee Ryu Matsumoto (松本 龍, born 1951), Japanese politician Ryu Shionoya (塩谷 立, born 1950), Japanese politician Ryu, a member of the musical group Styles of Beyond Ryutaro Nakahara (Ryu☆), Japanese musician and DJ ryukahr, American streamer and YouTuber
Other uses Ryū, the word for a Japanese dragon Ryū (school), a school of thought or discipline (for example a fighting school) ryu, the ISO 639-3 code for the Okinawan language Ryu SDN, an open source component-based Software-defined networking framework
See also Ryu (Korean name) (유 or 류 / 柳, 劉, 兪, 庾), a common Korean family name