Albertsons Library provides access to over 230 research databases and indexes via its "Articles, Databases" link on the library's homepage: http://library.boisestate.edu
We have created several subject-specific lists of databases germane to your topic. The following databases cover general aspects of the Japanese language and literature:
Nexis UNI (used to be Lexis Nexis Academic)
MLA International Bibliography
Interdisciplinary databases:
JSTOR: The Scholarly Journal Archive