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Researcher · Gifu Prefectural Tajimi Hospital · Japan

Kazuyuki Koyama

Kazuyuki Koyama publishes mostly in Obstetrics and Gynecology, Pediatrics, Perinatology and Child Health and Pulmonary and Respiratory Medicine, on topics such as Maternal and fetal healthcare, Uterine Myomas and Treatments and Gestational Trophoblastic Disease Studies.

OpenAlex
World rank
#7,390,946
of 7,710,434 ranked researchers
Rank in Japan
#345,983
of 383,136
Works
29
Citations
313
Citations per work
10.8
h-index
11
i10-index 11Top 45% in Obstetrics and Gynecology
Kazuyuki Koyama

What does Kazuyuki Koyama research?

Kazuyuki Koyama's work is mostly in Medicine (61%).

Health Sciences: 18 works · 61.1% of their workMedicine: 18 works · 61.1% of their workObstetrics and Gynecology: 5 works · 17.6% of their workPediatrics, Perinatology and Child Health: 4 works · 14.1% of their workPublic Health, Environmental and Occupational Health: 2 works · 8.2% of their workPulmonary and Respiratory Medicine: 2 works · 8.2% of their workRadiology, Nuclear Medicine and Imaging: 2 works · 7.1% of their workEpidemiology: 2 works · 5.9% of their workEverything else: 11 works · 38.9% of their workTHEIR WORKKazuyuki Koyama29works
Health Sciences61%

Their six largest subfields, inside their fields and domains; the grey slice is everything else they publish. The interactive view splits every one of their works down to single topics.

The fields and subfields, with their numbers
    1. Medicine1861.1%
  2. Everything else1138.9%
  1. 1Obstetrics and Gynecology18% of their works
  2. 2Pediatrics, Perinatology and Child Health14% of their works
  3. 3Pulmonary and Respiratory Medicine8% of their works
  4. 4Public Health, Environmental and Occupational Health8% of their works
  5. 5Radiology, Nuclear Medicine and Imaging7% of their works
  6. 6Epidemiology6% of their works

Research topics

Which keywords describe Kazuyuki Koyama's research?

The keywords of their largest research topics: Prenatal Diagnosis, Maternal Mortality, Placenta Accreta, Postpartum Hemorrhage, Uterine Fibroids, Uterine Leiomyoma, Chemotherapy and Reproductive Outcome.

Size is their works in the topics tagged with each word, from their 8 largest topics. Each links to the topic it comes from most.

All 20 words, with their numbers
  1. Prenatal Diagnosis152 topics
  2. Maternal Mortality132 topics
  3. Placenta Accreta111 topic
  4. Postpartum Hemorrhage111 topic
  5. Uterine Fibroids91 topic
  6. Uterine Leiomyoma91 topic
  7. Chemotherapy83 topics
  8. Reproductive Outcome52 topics
  9. Gestational Trophoblastic Disease41 topic
  10. Hydatidiform Mole41 topic
  11. Hysteroscopic Treatment31 topic
  12. Uterine Anomalies31 topic
  13. Cesarean Scar Pregnancy21 topic
  14. Ectopic Pregnancy21 topic
  15. Endoscopic Resection21 topic
  16. Gastric Cancer21 topic
  17. Human Papillomavirus21 topic
  18. Oropharyngeal Cancer21 topic
  19. Placental Development21 topic
  20. Preeclampsia21 topic

Where does Kazuyuki Koyama work?

Kazuyuki Koyama's main affiliation in the publication record is Gifu Prefectural Tajimi Hospital, Japan.

How many publications and citations does Kazuyuki Koyama have?

OpenAlex counts 29 works and 313 citations for Kazuyuki Koyama, an h-index of 11, ranking #7,390,946 of 7,710,434 researchers worldwide on the quality score.

Ranked on field-normalised excellence (50%), output (30%) and citations (20%). Counts come from OpenAlex author records, which occasionally merge different people who share a name or split one person into several.

Papers, co-authors, who cited this work and researchers on the nearest topics have tabs of their own, above. Is this your page? Claim it with your ORCID iD, or request a correction or removal.

Discussion

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