Personal information

Surgery, Breast cancer, Thyroid cancer, Clinical epidemiology, Database research
Japan

Activities

Employment (1)

University of Tokyo: Tokyo, JP

2018-04 to present
Employment
Source: Self-asserted source
Takaaki Konishi

Education and qualifications (6)

Japanese Breast Cancer Society: Tokyo, JP

2023-04-01 to present | Board certificated member
Qualification
Source: Self-asserted source
Takaaki Konishi

The University of Tokyo: Tokyo, JP

2023-03 to present | Doctor of Philosophy (Surgical Sciences)
Education
Source: Self-asserted source
Takaaki Konishi

Society for Clinical Epidemiology: Tokyo, JP

2023-02-01 to present | Board Certificated Expert
Qualification
Source: Self-asserted source
Takaaki Konishi

Ministry of Health, Labour and Welfare: Tokyo, JP

2020-04-01 to present | Board certificated consultant (Health Policy Bureau)
Qualification
Source: Self-asserted source
Takaaki Konishi

Japan Surgical Society: Tokyo, JP

2019-01-01 to present | Board Certified Surgeon
Qualification
Source: Self-asserted source
Takaaki Konishi

The Japan Central Organization on Quality Assurance of Breast Cancer Screening: Tokyo, JP

2018-07 to present | Qualified mammography reading doctor
Qualification
Source: Self-asserted source
Takaaki Konishi

Professional activities (14)

Japan Breast Cancer Society: Tokyo, JP

2023 to present | U-40 working group (Genaral affairs committee, Membership service subcommittee)
Membership
Source: Self-asserted source
Takaaki Konishi

Japan Surgical Society: Tokyo, JP

2022 to present | U-40 working group (Board of education)
Membership
Source: Self-asserted source
Takaaki Konishi

Japan Breast Cancer Society: Tokyo, JP

2022 to present | A committee member (Academic panel)
Membership
Source: Self-asserted source
Takaaki Konishi

Japan Breast Cancer Society: Tokyo, JP

2022 to present | A committee member (Registration and Data science board)
Membership
Source: Self-asserted source
Takaaki Konishi

Society for Clinical Epidemiology: Tokyo, JP

2021 to present | Editorial committee
Membership
Source: Self-asserted source
Takaaki Konishi

Japanese Breast Cancer Society: Tokyo, JP

2023-06 | Best Paper Award
Distinction
Source: Self-asserted source
Takaaki Konishi

Japanese Breast Cancer Society: Tokyo, JP

2023-06 | Academy Medal Prize
Distinction
Source: Self-asserted source
Takaaki Konishi

The University of Tokyo: Tokyo, JP

2023-01 | Best Paper Award (Department of Gastrointestinal, Breast, and Endocrine Surgery )
Distinction
Source: Self-asserted source
Takaaki Konishi

Society for Clinical Epidemiology: Tokyo, JP

2022-11 | Award for excellence
Distinction
Source: Self-asserted source
Takaaki Konishi

Japan Health Economics Association : Tokyo, JP

2022-09 | Best Young Presentation Award
Distinction
Source: Self-asserted source
Takaaki Konishi

Japanese Breast Cancer Society: Tokyo, JP

2022-06 | Breast Cancer Reviewer award
Distinction
Source: Self-asserted source
Takaaki Konishi

Japan Surgical Society: Tokyo, JP

2021-04 | Young investigator award
Distinction
Source: Self-asserted source
Takaaki Konishi

International Society for Peritoneal Dialysis: Brussels, BE

2021-03 | Editor's Choice Article 2018-2021
Distinction
Source: Self-asserted source
Takaaki Konishi

Ministry of Education, Culture, Sports, Science and Technology: Tokyo, JP

2019 | SciREX summer camp best first-place award
Distinction
Source: Self-asserted source
Takaaki Konishi

Funding (3)

Assessment of health outcomes other than cancers and health services among breast cancer survivors

2022-12 to 2023-11 | Grant
Pfizer Health Research Foundation (Tokyo, JP)
Source: Self-asserted source
Takaaki Konishi

Health economics study of perioperative chinese herbal medicine in gastrointestinal and breast cancer surgery: a nationwide database study in Japan

2022-05 to 2023-03 | Grant
Japan Kampo Medicines Manufacturers Association (Tokyo, JP)
Source: Self-asserted source
Takaaki Konishi

Treatment course for mastitis: a nationwide database study in Japan

2022-01 to 2023-03 | Grant
Kanzawa Medical Research Foundation (Matsumoto, Nagano, JP)
Source: Self-asserted source
Takaaki Konishi

Works (43)

Annual report of National Clinical Database-Breast Cancer Registry in 2021: characteristics categorized by body mass index and menopause status

Breast Cancer
2025-04-21 | Journal article
Contributors: Takaaki Konishi; Hiraku Kumamaru; Naoki Niikura; Yasuaki Sagara; Minoru Miyashita; Takayuki Iwamoto; Naoko Sanuki; Kenta Tanakura; Masayuki Nagahashi; Masayuki Yoshida et al.
Source: check_circle
Crossref

Respiratory complications after oesophagectomy using volatile or intravenous anaesthesia

British Journal of Surgery
2025-03-28 | Journal article
Contributors: Yuki Hirano; Takaaki Konishi; Hidehiro Kaneko; Shotaro Aso; Satoru Matsuda; Hirofumi Kawakubo; Yuya Kimura; Hiroki Matsui; Kiyohide Fushimi; Hiroyuki Daiko et al.
Source: check_circle
Crossref

Clinical course and management of pediatric gastroduodenal perforation beyond neonatal period

Pediatrics & Neonatology
2024-12 | Journal article
Contributors: Naohiro Takamoto; Takaaki Konishi; Michimasa Fujiogi; Mai Kutsukake; Kaori Morita; Yohei Hashimoto; Hiroki Matsui; Kiyohide Fushimi; Hideo Yasunaga; Jun Fujishiro
Source: check_circle
Crossref

Cost-Effectiveness Analysis of Adjuvant Pertuzumab and Trastuzumab in Human Epidermal Growth Factor Receptor 2-Positive Early Breast Cancer in Japan

Clinical Drug Investigation
2024-12 | Journal article
Contributors: Chanon Nusawat; So Sato; Hideaki Watanabe; Takaaki Konishi; Hayato Yamana; Hideo Yasunaga
Source: check_circle
Crossref

Comparison of olanzapine 2.5 mg and 5 mg in the prevention of chemotherapy-induced nausea and vomiting: a Japanese nationwide database study

International Journal of Clinical Oncology
2024-11 | Journal article
Contributors: Hiroe Suzuki-Chiba; Takaaki Konishi; Shotaro Aso; Kanako Makito; Hiroki Matsui; Taisuke Jo; Kiyohide Fushimi; Hideo Yasunaga
Source: check_circle
Crossref

Treatments and outcomes of neonatal disseminated intravascular coagulation with and without neonatal asphyxia: A retrospective study using nationwide data in Japan

Pediatrics & Neonatology
2024-03 | Journal article
Contributors: Hiroki Kitaoka; Takaaki Konishi; Yoshihiko Shitara; Atsushi Ito; Kohei Kashima; Yohei Hashimoto; Hiroki Matsui; Motohiro Kato; Naoto Takahashi; Hideo Yasunaga
Source: check_circle
Crossref

Impact of the National Action Plan for Antimicrobial Resistance on Antibiotic Use for Mastitis Using a Japanese Nationwide Database

Breast Care
2023 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Misuzu Sato; Nobuaki Michihata; Hiroki Matsui; Kotoe Nishioka; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref

ASO Author Reflections: Age at Oncological Surgery Affects the Long-Term Risk of Being Bedridden in Elderly Patients

Annals of Surgical Oncology
2023-08 | Journal article
Contributors: Takaaki Konishi; Yusuke Sasabuchi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref

ASO Visual Abstract: Long-Term Risk of Being Bedridden in Elderly Patients Who Underwent Oncologic Surgery—A Retrospective Study Using a Japanese Claims Database

Annals of Surgical Oncology
2023-08 | Journal article
Contributors: Takaaki Konishi; Yusuke Sasabuchi; Hiroki Matsui; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref

Long-Term Risk of Being Bedridden in Elderly Patients Who Underwent Oncologic Surgery: A Retrospective Study Using a Japanese Claims Database

Annals of Surgical Oncology
2023-08 | Journal article
Contributors: Takaaki Konishi; Yusuke Sasabuchi; Hiroki Matsui; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref

Author response to: Comment on: Early postoperative non-steroidal anti-inflammatory drugs and anastomotic leakage after oesophagectomy

British Journal of Surgery
2023-08-11 | Journal article
Contributors: Yuki Hirano; Takaaki Konishi; Hidehiro Kaneko; Satoru Matsuda; Hirofumi Kawakubo; Hiroyuki Daiko; Osamu Itano; Hideo Yasunaga; Yuko Kitagawa
Source: check_circle
Crossref

Weight loss during neoadjuvant therapy and short-term outcomes after esophagectomy: a retrospective cohort study

International Journal of Surgery
2023-04 | Journal article
Contributors: Yuki Hirano; Takaaki Konishi; Hidehiro Kaneko; Hidetaka Itoh; Satoru Matsuda; Hirofumi Kawakubo; Kazuaki Uda; Hiroki Matsui; Kiyohide Fushimi; Hiroyuki Daiko et al.
Source: check_circle
Crossref

Risk factors for arm lymphedema following breast cancer surgery: a Japanese nationwide database study of 84,022 patients

Breast Cancer
2023-01 | Journal article
Contributors: Takaaki Konishi; Masahiko Tanabe; Nobuaki Michihata; Hiroki Matsui; Kotoe Nishioka; Kiyohide Fushimi; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Current status of health technology assessment research in Japan

Annals of Clinical Epidemiology
2023-01-11 | Journal article
Part of ISSN: 2434-4338
Contributors: Takaaki Konishi; Hideo Yasunaga
Source: Self-asserted source
Takaaki Konishi

Association between body mass index and incidence of breast cancer in premenopausal women: A Japanese nationwide database study

ResearchSquare
2022 | Other
EID:

2-s2.0-85134101271

Contributors: Konishi, T.; Fujiogi, M.; Michihata, N.; Matsui, H.; Tanabe, M.; Seto, Y.; Yasunaga, H.
Source: Self-asserted source
Takaaki Konishi via Scopus - Elsevier

Clinical course and outcomes of pemphigus vulgaris and foliaceus: A retrospective study using a nationwide database in Japan

Journal of Dermatology
2022 | Journal article
EID:

2-s2.0-85143417541

Part of ISSN: 13468138 03852407
Contributors: Miyachi, H.; Konishi, T.; Hashimoto, Y.; Matsui, H.; Fushimi, K.; Inozume, T.; Yasunaga, H.
Source: Self-asserted source
Takaaki Konishi via Scopus - Elsevier

Comparison of short-term outcomes between pedicled- and free-flap autologous breast reconstruction: a nationwide inpatient database study in Japan

Breast Cancer
2022 | Journal article
EID:

2-s2.0-85134473961

Part of ISSN: 18804233 13406868
Contributors: Karakawa, R.; Konishi, T.; Yoshimatsu, H.; Fuse, Y.; Hashimoto, Y.; Matsui, H.; Fushimi, K.; Yano, T.; Yasunaga, H.
Source: Self-asserted source
Takaaki Konishi via Scopus - Elsevier

Risk Factors for Postoperative Bleeding Following Breast Cancer Surgery: A Nationwide Database Study of 477,108 Cases in Japan

World Journal of Surgery
2022-12 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Daisuke Shigemi; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
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Preferred source (of 2)‎

Comparison of bleeding following gastrointestinal endoscopic biopsy in patients treated with and without direct oral anticoagulants

Endoscopy International Open
2022-11-17 | Journal article
Contributors: Takaaki Konishi; Sachiko Ono; Akira Okada; Hiroki Matsui; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref

Surgical and obstetric outcomes of breast cancer surgery during pregnancy: a nationwide database study in Japan

Breast Cancer Research and Treatment
2022-10 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Daisuke Shigemi; Kotoe Nishioka; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Cost-effectiveness analysis of trastuzumab monotherapy versus adjuvant chemotherapy plus trastuzumab in elderly patients with HER2-positive early breast cancer

Japanese Journal of Clinical Oncology
2022-10-06 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Hiroyuki Ohbe; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref

Laparoscopic versus open distal pancreatectomy with or without splenectomy: A propensity score analysis in Japan

International Journal of Surgery
2022-08 | Journal article
Contributors: Takaaki Konishi; Takeshi Takamoto; Michimasa Fujiogi; Yohei Hashimoto; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Association between body mass index and incidence of breast cancer in premenopausal women: a Japanese nationwide database study

Breast Cancer Research and Treatment
2022-07 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Hiroki Matsui; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Interstitial lung disorders following postoperative radiotherapy with concurrent or sequential hormonal therapy for breast cancer: a nationwide database study in Japan

Breast Cancer
2022-07 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Ryosuke Kumazawa; Hiroyuki Ohbe; Hiroki Matsui; Kiyohide Fushimi; Mami Ogita; Masahiko Tanabe; Yasuyuki Seto et al.
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Association of Operative Day of the Week with the Length of Stay and Total Hospitalization Costs in Patients with Partial Mastectomy: A Nationwide Database Study in Japan

JMA Journal
2022-07-15 | Journal article
Part of ISSN: 2433-3298
Part of ISSN: 2433-328X
Source: Self-asserted source
Takaaki Konishi

ASO Author Reflections: Neoadjuvant Chemotherapy Does Not Affect Short-Term Outcomes After Breast Cancer Surgery

Annals of Surgical Oncology
2022-05 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

ASO Visual Abstract: Short-Term Outcomes Following Breast Cancer Surgery With and Without Neoadjuvant Chemotherapy: A Nationwide Administrative Database Study in Japan

Annals of Surgical Oncology
2022-05 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Ayaka Sato; Nobuaki Michihata; Ryosuke Kumazawa; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref

Short-Term Outcomes Following Breast Cancer Surgery With and Without Neoadjuvant Chemotherapy: A Nationwide Administrative Database Study in Japan

Annals of Surgical Oncology
2022-05 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Ayaka Sato; Nobuaki Michihata; Ryosuke Kumazawa; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
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Validity of operative information in Japanese administrative data: a chart review-based analysis of 1221 cases at a single institution

Surgery Today
2022-05-12 | Journal article
Part of ISSN: 0941-1291
Part of ISSN: 1436-2813
Source: Self-asserted source
Takaaki Konishi
grade
Preferred source (of 3)‎

New machine learning scoring system for predicting postoperative mortality in gastroduodenal ulcer perforation: A study using a Japanese nationwide inpatient database

Surgery
2022-04 | Journal article
Contributors: Takaaki Konishi; Tadahiro Goto; Michimasa Fujiogi; Nobuaki Michihata; Ryosuke Kumazawa; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
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Association between body mass index and incidence of breast cancer in premenopausal women: A Japanese nationwide database study

2022-03-29 | Preprint
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Hiroki Matsui; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref

Impact of body mass index on short-term outcomes after differentiated thyroid cancer surgery: a nationwide inpatient database study in Japan

European Thyroid Journal
2022-01-01 | Journal article
Part of ISSN: 2235-0802
Source: Self-asserted source
Takaaki Konishi
grade
Preferred source (of 2)‎

Clinical Characteristics and Incidences of Benign and Malignant Insulinoma Using a National Inpatient Database in Japan

Journal of Clinical Endocrinology and Metabolism
2021 | Journal article
EID:

2-s2.0-85121226133

Part of ISSN: 19457197 0021972X
Contributors: Kurakawa, K.I.; Okada, A.; Manaka, K.; Konishi, T.; Jo, T.; Ono, S.; Uda, K.; Michihata, N.; Matsui, H.; Fushimi, K. et al.
Source: Self-asserted source
Takaaki Konishi via Scopus - Elsevier

Outcomes of Nonoperative Treatment for Gastroduodenal Ulcer Perforation: a Nationwide Study of 14,918 Inpatients in Japan

Journal of Gastrointestinal Surgery
2021-11 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Ryosuke Kumazawa; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
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Preferred source (of 2)‎

Comparisons of postoperative outcomes after breast cancer surgery in patients with and without renal replacement therapy: a matched-pair cohort study using a Japanese nationwide inpatient database

Breast Cancer
2021-09-10 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Kojiro Morita; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Is portal vein embolization safe and effective for patients with impaired liver function?

Journal of Surgical Oncology
2021-06 | Journal article
Contributors: Takaaki Konishi; Takeshi Takamoto; Takuya Hashimoto; Masatoshi Makuuchi
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Comparing outcomes of nonoperative treatment for adhesive small bowel obstruction with and without antibiotics

Journal of Infection and Chemotherapy
2021-05 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Kojiro Morita; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Comparison of short-term surgical outcomes between men and women with breast cancer: a retrospective study using nationwide inpatient data in Japan

Breast Cancer Research and Treatment
2021-04-05 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Kojiro Morita; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Breast cancer surgery in patients with schizophrenia: short-term outcomes from a nationwide cohort

British Journal of Surgery
2021-03-12 | Journal article
Contributors: T Konishi; M Fujiogi; N Michihata; H Tanaka-Mizutani; K Morita; H Matsui; K Fushimi; M Tanabe; Y Seto; H Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Association between body mass index and localization of breast cancer: results from a nationwide inpatient database in Japan

Breast Cancer Research and Treatment
2021-01-19 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Kojiro Morita; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Impact of Body Mass Index on Outcomes After Breast Cancer Surgery: Nationwide Inpatient Database Study in Japan

Clinical Breast Cancer
2020-12 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Kojiro Morita; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
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Preferred source (of 2)‎

Treatments and outcomes of encapsulating peritoneal sclerosis in patients undergoing peritoneal dialysis: 295 cases from a nationwide inpatient database in Japan

Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
2020-11 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Nobuaki Michihata; Kojiro Morita; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Comparison of outcomes after differentiated thyroid cancer surgery performed with and without energy devices: A population-based cohort study using a nationwide database in Japan

International Journal of Surgery
2020-05 | Journal article
Contributors: Takaaki Konishi; Michimasa Fujiogi; Takayoshi Niwa; Kojiro Morita; Hiroki Matsui; Kiyohide Fushimi; Masahiko Tanabe; Yasuyuki Seto; Hideo Yasunaga
Source: check_circle
Crossref
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Peer review (37 reviews for 5 publications/grants)

Review activity for BMJ open. (5)
Review activity for Breast cancer research and treatment. (2)
Review activity for Breast cancer. (23)
Review activity for International journal of clinical oncology. (6)
Review activity for World journal of surgical oncology (1)