Although the database is multidisciplinary, the largest portion of the queries it receives is in the humanities and social sciences field, perhaps because CiNii is the only database that covers Japanese scholarly works in this field (as opposed to the natural, formal, and medical sciences which benefit from other databases).
Aínda que a base de datos é multidisciplinar, a maior parte das consultas que recibe é no campo das ciencias humanas e sociais, se cadra porque CiNii é a única base de datos que cobre traballos académicos xaponeses nese eido (a diferenza das ciencias naturais, formais, e médicas que se benefician doutras bases de datos).