Oin Junior and Senior High School

Oin Junior and Senior High School (桜蔭中学校・高等学校) is a private girls' school located in Hongo, Bunkyo, Tokyo that provides six-year secondary education programmes.

Overview
The school was founded in 1924 by members of the alumnae club of Tokyo Women's Normal School, Oin-kai (櫻蔭会). The first principal of the school, Kikuno Gokan (後閑菊野), had been responsible for the education of Empress Kojun, and she placed focus on manners in the creation of Oin as well.

Oin is known as one of the most selective secondary educational institutions in the country, and is one of the largest sources of successful applicants to the University of Tokyo, which is usually regarded as the nation's most selective and prestigious university. Nearly one third of graduates are consistently accepted into the University of Tokyo. In 2022, Oin Junior and Senior High School had the highest number of successful applicants in the country to the faculty of medicine at the University of Tokyo, which is considered the most difficult to get into. While being recognized for its high standards of education in science and mathematics, with students often representing Japan in the European Women's Mathematics Olympiad and other international scientific contests, it is also known for offering students authentic manners and moral classes. The curriculum is based on the school's mottos, aiming to cultivate good citizens.

Politicians

 * Miki Yamada: Member of the House of Representatives (LDP)
 * Mayuko Toyota: Former member of the House of Representatives (LDP)