Best research guide for dissertations held by NDL and other institutions. In Japanese.

The National Diet Library (NDL) started providing digitized doctoral dissertations on the Internet. 15,000 dissertations, which received between 1991 and 2000, are available in full text. Citations are available for other dissertations.

You can search more than 600,000 dissertations from here.

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Japanese Institutional Repositories Online. Meta search engine for institutional repositories that include Thesis or Dissertation. Full text of theses and dissertations submitted after 2014 are available.

As of October 2015, number of institutions is 442.