"artasiamerica is a professional digital archive of Asian/Asian American contemporary visual artists. It is a historical image & document archive specialized in Asian American visual culture from 1945 to the present" (artasiamerica website).
"Fully bilingual in both Japanese and English. Operated by an independent and neutral nonprofit organization, listing democratically events at both large and small scale venues. Comprehensive, covering as much as possible all the diverse… events happening in and around Tokyo" (Tokyo Art Beat website).
This institute is dedicated to the preservation and utilization of cultural properties. Known as Tobunken. The Japanese page (http://www.tobunken.go.jp/japanese/navi/database.html) includes several useful databases on art (added 12/4/2014).
Established in 1952 in Nara. The ancient city of Nara is known for its wealth of ancient architecture and historical works of art, and the Institute was established to conduct research on these materials. Some databases offered by this Institute are searchable in English. (added 2/23/2015)
This organization conducts interviews with individuals involved in the field of art and publishes their transcripts. Most of the interviews are conducted and available only in Japanese, but some of them are partially translated into English.