We chose an XML dump of Japanese Wikipedia dated 12 May 2015.
For the sake of reproducibility, we decided to stick with this snapshot.
Since this snapshot is no longer available in Wikimedia, we provide our copy here.
Yugo Murawaki and Shinsuke Mori. Wikification for Scriptio Continua. In Proceedings of the 10th Edition of its Language Resources and Evaluation Conference (LREC 2016), pp. ???-???, Portorož, Slovenia, May 2016. (to appear). [paper (our copy)]