Koichi Nagai

Profile Information

Affiliation: Department of Obstetrics and Gynecology, Yokohama City University Hospital

Degree: 博士（医学）

Researcher number: 40835815
ORCID ID: https://orcid.org/0000-0002-0230-1179
J-GLOBAL ID: 201801009029170342
researchmap Member ID: 7000023309

External link: http://www.ycu-obgyn.jp/

日本産科婦人科学会専門医・指導医
日本産科婦人科内視鏡学会技術認定医(腹腔鏡)
日本内視鏡外科学会技術認定医(産婦人科領域)
日本がん治療認定医機構がん治療認定医
日本女性医学学会女性ヘルスケア専門医・指導医

Research Interests

Research Areas

Life sciences / Obstetrics and gynecology /

Research History

Apr, 2024 - Present

Department of Obstetrics and Gynecology, Yokohama City University Hospital
Apr, 2023 - Present

Department of Obstetrics and Gynecology, Yokohama City University Hospital
Apr, 2021 - Mar, 2024

Assistant Professor, School of Medicine Medical Course Obstetrics and Gynecology, Yokohama City University
Apr, 2018 - Mar, 2021

Assistant Professor, Department of Obstetrics and Gynecology, Yokohama City University Hospital

Committee Memberships

Jul, 2023 - Present

編集部会, 一般社団法人神奈川県産科婦人科医会
Apr, 2022 - Present

技術審査員, 一般社団法人日本産科婦人科内視鏡学会
Jul, 2014 - Present

勤務医部会, 一般社団法人神奈川県産科婦人科医会

Major Awards

Sep, 2023

Best Reviewer Award, Japan Society of Gynecologic and Obstetric Endoscopy and Minimally Invasive Therapy

Koichi Nagai

Major Papers

Chronic Isolated Fallopian Tube Torsion in a Sexually Inactive Adolescent Female Diagnosed Peroperatively.

Yuhya Hirahara, Koichi Nagai, Kazunori Mukaida

Case reports in surgery, 2024 2581337-2581337, Jan, 2024 Peer-reviewed
MED12 mutations in uterine leiomyomas: prediction of volume reduction by gonadotropin-releasing hormone agonists.

Koichi Nagai, Ryoko Asano, Futoshi Sekiguchi, Mikiko Asai-Sato, Yohei Miyagi, Etsuko Miyagi

American Journal of Obstetrics and Gynecology, 228(2) 207.e1-207.e9, Feb, 2023 Peer-reviewedLead author
Strangulated internal hernia caused by an iatrogenic peritoneal band after total laparoscopic hysterectomy-A caveat to consider retroperitoneum closure.

Shizuka Sakurai, Yukio Suzuki, Koichi Nagai, Yumi Ishidera, Kazuya Nakagawa, Etsuko Miyagi

Clinical Case Reports, 10(11) e6550, Nov, 2022 Peer-reviewed
Evaluating the safety of dienogest in women with adenomyosis: A retrospective analysis.

Natsumi Ono, Ryoko Asano, Koichi Nagai, Yoshinobu Sugo, Tomomi Nakamura, Etsuko Miyagi

Journal of Obstetrics and Gynaecology Research, 47(4) 1433-1440, Apr, 2021 Peer-reviewed
Hyperthyroidism due to struma ovarii: Diagnostic pitfalls and preventing thyroid storm.

Koichi Nagai, Hiroshi Yoshida, Kayo Katayama, Yumi Ishidera, Yuka Oi, Noriko Ando, Hiroyuki Shigeta

Gynecology and Minimally Invasive Therapy, 6(1) 28-30, Jan, 2017 Peer-reviewedLead authorCorresponding author

Major Presentations

Umbilical Endometriosis and Vaginal Stump Endometriosis Developing after Total Laparoscopic Hysterectomy

Nagai K, Yamaguchi M, Ota Y, Miyagi E

51st AAGL Annual Global Congress on Minimally Invasive Gynecology, Dec, 2022
Fallopian tube torsion associated with hydrosalpinx successfully treated with laparoscopic surgery.

Hirahara Y, Nagai K, Aichi M, Mukaida K, Okuda M

33rd Annual Meeting of the Japan Society for Endoscopic Surgery, Mar, 2021
Expressions of vascular endothelial growth factor and angiopoietin-1 in MED12 mutated and wild-type uterine leiomyomas.

Asano R, Asai-Sato M, Mizushima T, Nagai K, Miyagi Y, Miyagi E

75th ASRM Scientific Congress, Oct, 2019
A case of epidermoid cyst of the ovary.

Mukaida K, Suzuki R, Aichi M, Suzuki T, Hirahara Y, Yokozawa T, Nagai K, Iwata A, Okuda M, Kubota Y

18th APAGE Annual Congress, Sep, 2017
Laparoscopic hysterectomy for atypical endometrial hyperplasia in a patient with myotonic dystrophy.

Suzuki R, Aichi M, Suzuki T, Hirahara Y, Yokozawa T, Nagai K, Iwata A, Mukaida K, Okuda M, Kubota Y

18th APAGE Annual Congress, Sep, 2017
Utility of Laparoscopic Resection of Ovarian Metastasis for Primary Tumor Identification.

Nagai K, Kutsuna T, Sonan Y, Shimomukai M, Wakabayashi R, Tochio A, Mukaida K, Suzuki R, Okuda M, Kubota Y

45th AAGL Annual Global Congress on Minimally Invasive Gynecology, Nov, 2016
Two cases of conversion to open laparotomy in laparoscopic surgery for pelvic abscesses.

Shimomukai M, Sonan Y, Kutsuna T, Wakabayashi R, Nagai K, Tochio A, Mukaida K, Suzuki R, Okuda M, Kubota Y

17th APAGE Annual Congress, Nov, 2016
A contrivance for shortening the surgical time of laparoscopic sacrocolpopexy (LSC).

Kubota Y, Suzuki R, Hirahara Y, Shimomukai M, Nagai K, Tochio A, Iwata A, Mukaida K, Okuda M, Takaki Y

17th APAGE Annual Congress, Nov, 2016
A case of ovarian tumor with urachal cyst.

Suzuki R, Kajiyama R, Kutsuna T, Hirahara Y, Shimomukai M, Nagai K, Tochio A, Iwata A, Mukaida K, Takayama T, Okuda M, Kubota Y

17th APAGE Annual Congress, Nov, 2016
Hyperthyroidism due to struma ovarii improved by laparoscopic tumor resection.

Nagai K, Katayama K, Ishidera Y, Oi Y, Ando N, Shigeta H, Yoshida H

19th International Meeting of the European Society of Gynaecological Oncology, Oct, 2015
Laparoscopic surgery for obese endometrial cancer patients.

Nakamura Y, Katayama K, Kitajima M, Sekiguchi F, Nagai K, Matsuzaki Y, Ishidera Y, Oi Y, Ando N, Shigeta H, Yoshida H

19th International Meeting of the European Society of Gynaecological Oncology, Oct, 2015
Malignant lymphoma, which was diagnosed by pelvic lymph node biopsy during a total laparoscopic hysterectomy.

Tanioka S, Nagai K, Katayama K, Ishidera Y, Oi Y, Ando N, Shigeta H, Yoshida H

XXI FIGO World Congress of Gynecology and Obstetrics, Oct, 2015
A case of mesenteric cyst difficult to distinguish from ovarian tumor.

Nagai K, Ishii M, Oi Y, Suzuki R, Takei M, Ando N, Shigeta H

Royal College of Obstetricians & Gynaecologists World Congress, Mar, 2014

Major Professional Memberships

Research Projects

低エストロゲン環境下の子宮筋腫縮小をMED12遺伝子変異から予測する

Clinical Research Grant, Clinical Research Grant, Kanto-Rengo Society of Obstetrics and Gynecology, Jan, 2022 - Dec, 2024

Koichi Nagai
MED12 mutations in uterine leiomyomas: prediction of response to GnRH analogs

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2022 - Mar, 2025

Koichi Nagai
子宮筋腫の遺伝子変異を同定する非侵襲的バイオマーカーの開発

2022 LIP. Yokohama Trial Grant, Kihara Memorial Yokohama Foundation for the Advancement of Life Sciences, Jun, 2022 - Mar, 2023

Koichi Nagai
Exploration of genetic factors associated with uterine leiomyoma shrinkage and development of imaging biomarkers using diffusion-weighted magnetic resonance imaging

研究助成金, Seiichi Imai Memorial Foundation, Jan, 2023 - Dec, 2024

Koichi Nagai

Major Social Activities

神奈川県地域医療セミナー

Lecturer, Official expert, Logistic support

神奈川県, Mar 20, 2024
医師の働き方改革セミナー

Lecturer, Official expert, Logistic support

神奈川県若手産婦人科医の会, Jan 8, 2023

Profile Information

Research Interests

Research Areas

Research History

Committee Memberships

Major Awards

Major Papers

Major Presentations

Major Professional Memberships

Research Projects

Major Social Activities

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