World's Best Scientists 2026 revealed!
Hitoshi Sakai

Hitoshi Sakai

D-Index & Metrics

Earth Science

D-Index
49
Citations
9590
World Ranking
3573
National Ranking
77

Hitoshi Sakai publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Hitoshi Sakai sits on this spectrum.

38–42 publications: 1 scientists 43–47 publications: 0 scientists 48–52 publications: 3 scientists 53–57 publications: 8 scientists 58–62 publications: 11 scientists 63–67 publications: 16 scientists 68–72 publications: 24 scientists 73–77 publications: 31 scientists 78–82 publications: 49 scientists 83–87 publications: 77 scientists 88–92 publications: 86 scientists 93–97 publications: 88 scientists 98–102 publications: 92 scientists 103–107 publications: 84 scientists 108–112 publications: 102 scientists 113–117 publications: 108 scientists 118–122 publications: 117 scientists 123–127 publications: 126 scientists 128–132 publications: 146 scientists 133–137 publications: 114 scientists 138–142 publications: 102 scientists 143–147 publications: 127 scientists 148–152 publications: 102 scientists 153–157 publications: 112 scientists 158–162 publications: 102 scientists 163–167 publications: 127 scientists 168–172 publications: 121 scientists 173–177 publications: 112 scientists 178–182 publications: 109 scientists 183–187 publications: 98 scientists 188–192 publications: 92 scientists 193–197 publications: 105 scientists 198–202 publications: 77 scientists 203–207 publications: 80 scientists 208–212 publications: 89 scientists 213–217 publications: 70 scientists 218–222 publications: 74 scientists 223–227 publications: 74 scientists 228–232 publications: 70 scientists 233–237 publications: 67 scientists 238–242 publications: 59 scientists 243–247 publications: 67 scientists 248–252 publications: 51 scientists 253–257 publications: 46 scientists 258–262 publications: 41 scientists 263–267 publications: 39 scientists 268–272 publications: 34 scientists 273–277 publications: 39 scientists 278–282 publications: 35 scientists 283–287 publications: 36 scientists 288–292 publications: 35 scientists 293–297 publications: 29 scientists 298–302 publications: 23 scientists 303–307 publications: 39 scientists 308–312 publications: 34 scientists 313–317 publications: 23 scientists 318–322 publications: 18 scientists 323–327 publications: 18 scientists 328–332 publications: 21 scientists 333–337 publications: 20 scientists 338–342 publications: 15 scientists 343–347 publications: 13 scientists 348–352 publications: 24 scientists 353–357 publications: 25 scientists 358–362 publications: 10 scientists 363–367 publications: 20 scientists 368–372 publications: 17 scientists 373–377 publications: 18 scientists 378–382 publications: 15 scientists 383–387 publications: 7 scientists 388–392 publications: 22 scientists 393–397 publications: 9 scientists 398–402 publications: 11 scientists 403–407 publications: 16 scientists 408–412 publications: 4 scientists 413–417 publications: 5 scientists 418–422 publications: 14 scientists 423–427 publications: 8 scientists 428–432 publications: 7 scientists 433–437 publications: 7 scientists 438–442 publications: 10 scientists 443–447 publications: 10 scientists 448–452 publications: 3 scientists 453–457 publications: 9 scientists 458–462 publications: 11 scientists 463–467 publications: 4 scientists 468–472 publications: 6 scientists 473–477 publications: 11 scientists 478–482 publications: 8 scientists 483–487 publications: 2 scientists 488–492 publications: 3 scientists 493–497 publications: 4 scientists 498–502 publications: 4 scientists 503–507 publications: 4 scientists 508–509 publications: 4 scientists 510+ publications: 100 scientists
38 publications 510+

This scientist: 130 publications — 26th percentile

26% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 510 publications or more.

Hitoshi Sakai D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Hitoshi Sakai sits on this spectrum.

30 D-Index: 15 scientists 31 D-Index: 42 scientists 32 D-Index: 60 scientists 33 D-Index: 90 scientists 34 D-Index: 103 scientists 35 D-Index: 108 scientists 36 D-Index: 142 scientists 37 D-Index: 147 scientists 38 D-Index: 147 scientists 39 D-Index: 152 scientists 40 D-Index: 143 scientists 41 D-Index: 157 scientists 42 D-Index: 141 scientists 43 D-Index: 151 scientists 44 D-Index: 140 scientists 45 D-Index: 135 scientists 46 D-Index: 121 scientists 47 D-Index: 108 scientists 48 D-Index: 128 scientists 49 D-Index: 111 scientists 50 D-Index: 106 scientists 51 D-Index: 112 scientists 52 D-Index: 102 scientists 53 D-Index: 103 scientists 54 D-Index: 94 scientists 55 D-Index: 61 scientists 56 D-Index: 101 scientists 57 D-Index: 71 scientists 58 D-Index: 65 scientists 59 D-Index: 78 scientists 60 D-Index: 93 scientists 61 D-Index: 56 scientists 62 D-Index: 58 scientists 63 D-Index: 52 scientists 64 D-Index: 63 scientists 65 D-Index: 49 scientists 66 D-Index: 53 scientists 67 D-Index: 57 scientists 68 D-Index: 50 scientists 69 D-Index: 44 scientists 70 D-Index: 44 scientists 71 D-Index: 31 scientists 72 D-Index: 33 scientists 73 D-Index: 33 scientists 74 D-Index: 23 scientists 75 D-Index: 32 scientists 76 D-Index: 24 scientists 77 D-Index: 17 scientists 78 D-Index: 19 scientists 79 D-Index: 9 scientists 80 D-Index: 21 scientists 81 D-Index: 20 scientists 82 D-Index: 17 scientists 83 D-Index: 19 scientists 84 D-Index: 19 scientists 85 D-Index: 14 scientists 86 D-Index: 6 scientists 87 D-Index: 14 scientists 88 D-Index: 17 scientists 89 D-Index: 10 scientists 90 D-Index: 8 scientists 91 D-Index: 8 scientists 92 D-Index: 9 scientists 93 D-Index: 6 scientists 94+ D-Index: 98 scientists
30 D-Index 94+

This scientist: 49 D-Index — 54th percentile

54% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 94 D-Index or more.

Research.com Recognitions

  • GSA Honorary Fellow Award, The Geological Society of America
  • GSA Honorary Fellow Award, The Geological Society of America
  • GSA Honorary Fellow Award, The Geological Society of America

Overview

Hitoshi Sakai was affiliated with the University of Tokyo in Japan and contributed extensively to medical and immunological research. Their academic work predominantly focused on the fields of Medicine and Immunology and Microbiology, with notable subfields including Immunology, Genetics, Pathology and Forensic Medicine, Hematology, and Oncology.

The research topics Sakai concentrated on included Immunodeficiency and Autoimmune Disorders, Chronic Lymphocytic Leukemia Research, Immune Cell Function and Interaction, Lymphoma Diagnosis and Treatment, Hematopoietic Stem Cell Transplantation, CAR-T cell therapy research, and Chronic Myeloid Leukemia Treatments.

Frequent publication venues where Sakai's work appeared were:

  • International Journal of Hematology
  • Bone Marrow Transplantation
  • Annals of Hematology
  • Zenodo (CERN European Organization for Nuclear Research)
  • Blood

Some of their recent papers included:

  • "T cell clonal expansion and STAT3 mutations: a characteristic feature of acquired chronic T cell-mediated pure red cell aplasia," 2022, International Journal of Hematology
  • "Allogeneic stem cell transplantation for patients with aggressive NK-cell leukemia," 2020, Bone Marrow Transplantation
  • "Minimal residual disease (MRD) positivity at allogeneic hematopoietic cell transplantation, not the quantity of MRD, is a risk factor for relapse of Philadelphia chromosome-positive acute lymphoblastic leukemia," 2021, International Journal of Hematology
  • "High frequency of STAT3 gene mutations in T-cell receptor (TCR)γδ-type T-cell large granular lymphocytic leukaemia: implications for molecular diagnostics," 2020, British Journal of Haematology
  • "A Phase I/II Clinical Trial of Piggybac-Modified GMR CAR-T Cell Therapy for CD116 Positive Relapsed/Refractory Myeloid Malignancies," 2021, Blood

Sakai collaborated frequently with a number of researchers, among whom the most common co-authors included:

  • Hideyuki Nakazawa
  • Fumihiro Ishida
  • Toru Kawakami
  • Sayaka Nishina
  • Fumihiro Kawakami

The scientist's research contributed multiple publications to several notable hematological and transplantation journals, reflecting a focus on hematopoietic stem cell transplantation and related disorders.

Hitoshi Sakai was a recipient of the GSA Honorary Fellow Award from The Geological Society of America, reflecting recognition within their field. The scientist is recorded as deceased.

Best Publications

  • The age curves of sulfur and oxygen isotopes in marine sulfate and their mutual interpretation

    George E. Claypool;William T. Holser;Isaac R. Kaplan;Hitoshi Sakai

  • Concentrations and isotope ratios of carbon, nitrogen and sulfur in ocean-floor basalts

    H. Sakai;D.J.Des Marais;A. Ueda;J.G. Moore

  • Isotopic properties of sulfur compounds in hydrothermal processes

    Hitoshi Sakai

  • Oxygen isotope exchange rate between dissolved sulfate and water at hydrothermal temperatures

    Hitoshi Chiba;Hitoshi Sakai

  • Sulfur isotope study of Quaternary volcanic rocks from the Japanese Islands Arc

    Akira Ueda;Hitoshi Sakai

  • Chemistry and isotope ratios of sulfur in basalts and volcanic gases at Kilauea volcano, Hawaii

    Hitoshi Sakai;Thomas J. Casadevall Casadevall;James G. Moore

  • Noble gases in submarine glasses from mid-oceanic ridges and Loihi seamount: Constraints on the early history of the Earth

    H Hiyagon;M Ozima;B Marty;S Zashu

  • Drilling deep into young oceanic crust, Hole 504B, Costa Rica Rift

    K. Becker;H. Sakai;A. C. Adamson;J. Alexandrovich

  • Spacial and temporal variations of water characteristics in the Japan Sea bottom layer

    Toshitaka Gamo;Yoshiyuki Nozaki;Hitoshi Sakai;Toshisuke Nakai

  • Antarctic saline lakes—stable isotopic ratios, chemical compositions and evolution

    Osamu Matsubaya;Hitoshi Sakai;Tetsuya Torii;Harry Burton

  • Hydrogen and oxygen isotopic ratios and major element chemistry of Japanese thermal water systems

    Osamu Matsubaya;Hitoshi Sakai;Isao Kusachi;Hiroshi Satake

  • Fractionation of sulphur isotopes in nature

    Hitoshi Sakai

  • Stable isotopic studies of Japanese geothermal systems

    Unknown

  • Isotopic Geochemistry of the Thermal Waters of Japan and its Bearing on the Kuroko Ore Solutions

    Hitoshi Sakai;Osamu Matsubaya

  • Active hydrothermal mounds in the Okinawa Trough backarc basin, Japan

    M. Kimura;S. Uyeda;Y. Kato;T. Tanaka

  • Deep-sea communities dominated by the giant clam, Calyptogena soyoae, along the slope foot of Hatsushima Island, Sagami Bay, Central Japan

    Jun Hashimoto;Suguru Ohta;Takeo Tanaka;Hiroshi Hotta

  • Isotope geochemistry of oxygen in the sedimentary sulfate cycle

    William T. Holser;Isaac R. Kaplan;Hitoshi Sakai;Israel Zak

  • The distribution of 230Th and 231Pa in the deep-sea surface sediments of the Pacific Ocean

    Han-Soeb Yang;Yoshiyuki Nozaki;Hitoshi Sakai;Akimasa Masuda

  • Peculiar features of Suiyo Seamount hydrothermal fluids, Izu-Bonin Arc: Differences from subaerial volcanism

    U. Tsunogai;J. Ishibashi;H. Wakita;T. Gamo

  • Oxygen-18 and deuterium determination on a single water sample of a few milligrams

    Noriaki. Kishima;Hitoshi. Sakai

  • Constraints on the evolution of the Japan Sea based on 40Ar- 39Ar ages and Sr isotopic ratios for volcanic rocks of the Yamato Seamount chain in the Japan Sea

    Ichiro Kaneoka;Kenji Notsu;Yutaka Takigami;Kantaro Fujioka

Frequent Co-Authors

Toshitaka Gamo
Toshitaka Gamo University of Tokyo
Minoru Kusakabe
Minoru Kusakabe Okayama University
Jun-ichiro Ishibashi
Jun-ichiro Ishibashi Kobe University
Hiroo Kagami
Hiroo Kagami Niigata University
Philippe Pezard
Philippe Pezard University of Montpellier
Kantaro Fujioka
Kantaro Fujioka Kanagawa University
Yoshiyuki Nozaki
Yoshiyuki Nozaki University of Tokyo
Keir Becker
Keir Becker University of Miami
Jeffrey C. Alt
Jeffrey C. Alt University of Michigan–Ann Arbor
Roger N. Anderson
Roger N. Anderson Columbia University

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Exploring Earth Science opens many doors to interdisciplinary careers and educational opportunities. Many students consider complementing their Earth Science background with language skills by enrolling in best military friendly online spanish degrees. This combination enhances communication abilities in global scientific fields and government roles.

For those interested in combining science with creativity and practical application, pursuing online MFA programs can foster skills in environmental design, scientific illustration, or science communication. These programs provide flexibility for career changers or professionals looking to expand their creative expertise alongside scientific knowledge.

Career advancement in science organizations or environmental firms often benefits from strong leadership and administrative skills. Enrolling in the best online master degree in human resource management can prepare graduates for management roles, optimizing workforce potential and fostering innovation in science-driven companies.

Seniors or returning students aiming for shorter programs may find valuable options among one year degree for seniors programs. These degrees offer accelerated learning paths, which are perfect for acquiring focused knowledge and quickly transitioning into specialized Earth Science or environmental careers.

Best Scientists Citing Hitoshi Sakai

Recently Published Articles