成立学園中学・高等学校 is the Japanese Combined Junior and Senior High School in Japan founded in 1925.
According to PR-model, seiritsu.ac.jp is ranked 903,179th in multilingual Wikipedia, in particular this website is ranked 71,933rd in Japanese Wikipedia.
The website is placed before sg.fr and after menziesvirtualmuseum.org.au in the BestRef global ranking of the most important sources of Wikipedia.