For the searches in OLD BOOK DATABASE, we use Kanji Unification Index.
The copyright of Kanji Unification Index belongs to NII (National Institute of informations)
This database is for trial.
Please refer to Otani University Library for the use of materials.
About the contents of data, we update it sequentially.
About a search screen or design of the result indication screen, we may change it without a notice.
In addition, we may stop service without a notice.