The closest station to Ochanomizu Senior High School/University is the Myougatani and Gokokuji station. Myougatani station is the Marunouchi-subway line, Gokokuji station is the Yuurakuchou-subway line. If you go to Ochanomizu Senior High School/University from Tokyo, Marunouchi-line is no changing train. It takes about 11 minutes on Marunouchi-line to Myougatani from Tokyo.