IRDB Contents Analysis System (Japanese Institutional Repositories Database developed by NII) was updated on June 2, 2009.

This is like the Japanese version of ROAR, which provides information on Japanese institutional repositories, such as the growth of records by resource type and the profile of each IR.

We have made the following improvements:

1) The default in "Content growth" has been changed to "Full text".
- You can select either "Full text" or "ALL" from the pull-down menu.

2) "Breakdown of content by resource type (ratio)" has been added.
- The breakdown of the latest data and the pie chart are displayed.

3) The details of data have been hidden.
- The numbers of records which had been shown horizontally are no longer displayed.
- The breakdown can be downloaded by clicking "TSV Download".

4) The analysis of content has been added.
- NDC (Nippon Decimal Classification) distribution, File format distribution and others are additionally shown. And the percentage of input is displayed respectively.

At the same time, we have reduced the load time of the front page as part of the improvements.