Osaka Tōin Junior and Senior High School (abbr)
Abbreviation for 大阪桐蔭中学校・高等学校, a well-known private school in Osaka. Used in sports and education contexts.
Osaka Tōin has won the Koshien tournament many times.
Abbreviation of 大阪桐蔭中学校・高等学校 (Osaka Tōin Junior and Senior High School). The name 桐蔭 (tōin) is a poetic term meaning 'paulownia shade', often used in school names.