Usui Pass Exchange Memorial Foundation is the general foundation in Japan founded in 1999 by Matsuida.
According to PR-model, usuitouge.com is ranked 499,449th in multilingual Wikipedia, in particular this website is ranked 41,326th in Japanese Wikipedia.
The website is placed before nighvision.net and after crownoffice.gov.uk in the BestRef global ranking of the most important sources of Wikipedia.