Sapporo Transportation Service Promotion Corporation is the Kōsha in Japan founded in 1988 by Takeshi Itagaki.
According to PR-model, stsp.or.jp is ranked 152,265th in multilingual Wikipedia, in particular this website is ranked 10,713th in Japanese Wikipedia.
The website is placed before afmentor.com and after honda.mx in the BestRef global ranking of the most important sources of Wikipedia.