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Published on in Vol 14 (2026)

Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/97411, first published .
Doctors in a meeting reviewing medical scans and laptop data

Balancing Privacy Protection and Reproducible Entity Extraction in Real-World Data in the Development of a Framework for Deidentified Japanese Electronic Health Record Narratives Using BERT: Retrospective Observational Study

Balancing Privacy Protection and Reproducible Entity Extraction in Real-World Data in the Development of a Framework for Deidentified Japanese Electronic Health Record Narratives Using BERT: Retrospective Observational Study

Nobuo Mochizuki   1 , PhD ;   Atsushi Ikeda   1 , MS ;   Hideyuki Ohshima   1 , MS ;   Yukika Fukuda   1 , BS ;   Kyoko Okuda   1 , BS ;   Ryota Komaki   1 , MS ;   Tomoyuki Matsunaga   1 , MS ;   Kenichi Kudo   2 , BS ;   Shintaro Goto   3 , BS ;   Motoki Amai   3 , PhD ;   Yusuke Suzuki   1 , MS

1 Health Data Business Development Center, Business Development Division, TOPPAN Holdings Inc., Bunkyo-ku, Tokyo, Japan

2 Japan Medical Association Medical Information Management Organization, Bunkyo-ku, Tokyo, Japan

3 Department of Data Management, Integrated Clinical Care Informatics Inc, Bunkyo-ku, Tokyo, Japan

Corresponding Author:

  • Nobuo Mochizuki, PhD
  • Health Data Business Development Center, Business Development Division
  • TOPPAN Holdings Inc.
  • 1-3-3, Suido
  • Bunkyo-ku, Tokyo 112-8531
  • Japan
  • Phone: 81 3-3835-5111
  • Email: nobuo.mochizuki@toppan.co.jp