Here is a short list of useful library catalogs for Japanese studies.
UC Library Search is the unified discovery and borrowing system for all 10 UC Campuses. Select the UCLA Library Catalog scope to search holdings of materials owned by the UCLA Library and other UCLA collections, whether online or in print. Does not contain full-text articles or article citations. Select the Articles, books and more scope to search for materials in all 10 UC campuses. More information in this guide.
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.