Ritsu may refer to:
Vinaya, the Buddhist regulatory framework Risshū (Buddhism), a name of a Japanese school of Buddhism strictly following this framework the historical Japanese term for a criminal code as part of the Ritsuryō law system Ritsu scale, a type of musical scale; see Ritsu and ryo scales
People with the given name , Japanese footballer , subject in a forged interview on The Asahi Shimbun Grayce Uyehara, born Grayce Ritsu Kaneda (19192014), Japanese-American activitst , former guitarist in The Stalin
Fictional characters , a character in the manga series Assassination Classroom , a character in the ONA and anime series Kemurikusa , a character in the manga and anime series Fire Force , a character in the light novel series R-15 , a character in the television drama series Half Blue Sky , a character in the manga series Chūgakusei Nikki , a character in the manga series Gin no Spoon , a character in the anime series Mewkledreamy , a character in the manga and anime series Mob Psycho 100 , a character in the novel Hana no Furu Gogo Ritsu Kamiji, a character in the visual novel series Parascientific Escape , a character in the manga and anime series Ouran High School Host Club , a character in the manga series The Kawai Complex Guide to Manors and Hostel Behavior , a character in the visual novel The Fruit of Grisaia , a character in the manga series Loveless , a character in the light novel series As a Reincarnated Aristocrat, I'll Use My Appraisal Skill to Rise in the World Ritsu Namine (波音リツ), a voicebank of UTAU program , a character in the anime series Kado: The Right Answer , a character in the manga and anime series The World's Greatest First Love , a character in the anime series Pretty Rhythm: Rainbow Live , a character in the game franchise Ensemble Stars! , a character in the anime series Star-Myu , the protagonist in the anime series Caligula , a character in the light novel series Asura Cryin' Ritsu Shito (Chinese: ), a character in the manhua Spiritpact , a character in the manga and anime series Fruits Basket , a character in the manga and anime series K-On!