Nii.ac.jp is tracked by us since April, 2011. Over the time it has been ranked as high as 3 959 in the world, while most of its traffic comes from Japan, where it reached as high as 270 position. Cir.nii.ac.jp receives about 46.67% of its total traffic. It was owned by several entities, from Research Organization of Information and Systems National Institute of Informatics to Tanabe Toshiharu of National Institute of Informatics, it was hosted by Research Organization of Information and Systems National Institute of Informatics, Amazon Technologies Inc. and others.

Cir.nii has the lowest Google pagerank and bad results in terms of Yandex topical citation index. We found that Cir.nii.ac.jp is poorly ‘socialized’ in respect to any social network. According to MyWot and Google safe browsing analytics, Cir.nii.ac.jp is a fully trustworthy domain with no visitor reviews.