Characteristics of female breast cancer in japan: annual report of the National Clinical Database in 2018

Keiichiro Tada, Hiraku Kumamaru, Hiroaki Miyata, Sota Asaga, Kotaro Iijima, Etsuyo Ogo, Takayuki Kadoya, Makoto Kubo, Yasuyuki Kojima, Kenta Tanakura, Kenji Tamura, Masayuki Nagahashi, Naoki Niikura, Naoki Hayashi, Minoru Miyashita, Masayuki Yoshida, Shinji Ohno, Shigeru Imoto, Hiromitsu Jinno

Research output: Contribution to journalArticlepeer-review


Information regarding patients who were treated for breast cancer in 2018 was extracted from the National Clinical Database (NCD), which is run by Japanese physicians. This database continues from 1975, created by the Japanese Breast Cancer Society (JBCS). A total of 95,620 breast cancer cases were registered. The demographics, clinical characteristics, pathology, surgical treatment, adjuvant chemotherapy, adjuvant endocrine therapy, and radiation therapy of Japanese breast cancer patients were summarized. We made comparisons with other reports to reveal the characteristics of our database. We also described some features in Japanese breast cancer that changed over time. The unique characteristics of breast cancer patients in Japan may provide guidance for future research and improvement in healthcare services.

Original languageEnglish
Pages (from-to)157-166
Number of pages10
JournalBreast Cancer
Issue number2
Publication statusPublished - 2023 Mar
Externally publishedYes


  • Annual report
  • Breast neoplasms
  • Japanese Breast Cancer Society
  • National Clinical Database in Japan
  • Registry

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Pharmacology (medical)


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