Here is a short list of useful library catalogs for Japanese studies.
Here is a short list of sources for finding materials available on the market for Japanese studies.
Some titles listed below are for building use only.
Here is a short list of useful bibliographies of bibliographies.
Here is a short list of useful articles databases for Japanese studies. Note that many of these sources only index journal articles -- they don't actually have the full text. Use the gold "UC-eLinks" button to do an automated search to find the full text or citation linker, or search for the journal title in the UCLA Library Catalog.