I made a new dataloader to use metadata from CiNii Article. This source is very usefull for Japanese repository and I think it is worth to include this dataloader to DSpace as a default setting.
"CiNii Articles" is a search service provided by NII which enables you to search information on academic articles published in academic society journals, university research bulletins or articles included in the National Diet Library's Japanese Periodicals Index Database. See http://ci.nii.ac.jp/info/en/cinii_outline.html for details.
There are metadata which are not included in DSpace default metadata-field-set. Now I set these metadata in bte.xml. If it is not adequate, I will comment out them.