Ritsu

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

 * Ritsu Doan (堂安 律), Japanese footballer
 * Ritsu Ito (伊藤 律), subject in a forged interview on The Asahi Shimbun
 * Grayce Uyehara, born Grayce Ritsu Kaneda (1919–2014), Japanese-American activitst
 * Ritsu Saito (斉藤 律), former guitarist in The Stalin

Fictional characters

 * Ritsu (律), a character in the manga series Assassination Classroom
 * Ritsu (律), a character in the ONA and anime series Kemurikusa
 * Ritsu (リツ), a character in the manga and anime series Fire Force
 * Ritsu Enshū (円周 率), a character in the light novel series R-15
 * Ritsu Hagio (萩尾 律), a character in the television drama series Hanbun, Aoi
 * Ritsu Haraguchi (原口 律), a character in the manga series Chūgakusei Nikki
 * Ritsu Hayakawa (早川 律), a character in the manga series Gin no Spoon
 * Ritsu Imai (今井 律), a character in the anime series Mewkledreamy
 * Ritsu Kageyama (影山 律), a character in the manga and anime series Mob Psycho 100
 * Ritsu Kai (甲斐 リツ), a character in the novel Hana no Furu Gogo
 * Ritsu Kamiji, a character in the visual novel series Parascientific Escape
 * Ritsu Kasanoda (笠野田 律), a character in the manga and anime series Ouran High School Host Club
 * Ritsu Kawai (河合 律), a character in the manga series The Kawai Complex Guide to Manors and Hostel Behavior
 * Ritsu Koide (小出 律), a character in the visual novel The Fruit of Grisaia
 * Ritsu Minami (南 律), a character in the manga series Loveless
 * Ritsu Muses (リーツ・ミューセス), a character in the light novel series As a Reincarnated Aristocrat, I'll Use My Appraisal Skill to Rise in the World
 * Ritsu Natsume (夏目 律), a character in the anime series Kado: The Right Answer
 * Ritsu Onodera (小野寺 律), a character in the manga and anime series The World's Greatest First Love
 * Ritsu Renjoji (蓮城寺 律), a character in the anime series Pretty Rhythm: Rainbow Live
 * Ritsu Sakuma (朔間 凛月), a character in the game franchise Ensemble Stars!
 * Ritsu Saotome (早乙女 律), a character in the anime series Star-Myu
 * Ritsu Shikishima (式島 律), the protagonist in the anime series Caligula
 * Ritsu Shioizumi (潮泉 律都), a character in the light novel series Asura Cryin'
 * Shito Ritsu (Chinese: 司徒律), a character in the manhua Spiritpact
 * Ritsu Soma (草摩 利津), a character in the manga and anime series Fruits Basket
 * Ritsu Tainaka (田井中 律), a character in the manga and anime series K-On!