Koji Sumitani

2.6k total citations · 2 hit papers
22 papers, 2.1k citations indexed

About

Koji Sumitani is a scholar working on Molecular Biology, Organic Chemistry and Oncology. According to data from OpenAlex, Koji Sumitani has authored 22 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Molecular Biology, 6 papers in Organic Chemistry and 4 papers in Oncology. Recurrent topics in Koji Sumitani's work include Bone Metabolism and Diseases (9 papers), Bone health and treatments (4 papers) and Catalytic Cross-Coupling Reactions (3 papers). Koji Sumitani is often cited by papers focused on Bone Metabolism and Diseases (9 papers), Bone health and treatments (4 papers) and Catalytic Cross-Coupling Reactions (3 papers). Koji Sumitani collaborates with scholars based in Japan and Slovenia. Koji Sumitani's co-authors include Makoto Kumada, Kohei Tamao, Yoshihisa Kiso, Akio Minato, Isao Nakajima, S. Kodama, Michio Zembayashi, Akira Fujioka, Terushige Kawata and Masayoshi Kumegawa and has published in prestigious journals such as Journal of the American Chemical Society, Biochemical and Biophysical Research Communications and FEBS Letters.

In The Last Decade

Koji Sumitani

22 papers receiving 2.0k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Selective carbon-carbon bond formation by cross-coupling of Grignard reagents with organic halides. Catalysis by nickel-phosphine complexes

1972 988 citations Kohei Tamao, Koji Sumitani et al. Journal of the American Chemical Society profile →
Nickel-Phosphine Complex-Catalyzed Grignard Coupling. I. Cross-Coupling of Alkyl, Aryl, and Alkenyl Grignard Reagents with Aryl and Alkenyl Halides: General Scope and Limitations

1976 499 citations Kohei Tamao, Koji Sumitani et al. Bulletin of the Chemical Society of Japan profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Koji Sumitani Japan	15	1.5k	371	287	151	146	22	2.1k
Dieter Kaufmann Germany	28	2.5k 1.7×	297 0.8×	471 1.6×	145 1.0×	493 3.4×	152	3.2k
Harold Weingarten United States	18	801 0.5×	413 1.1×	145 0.5×	56 0.4×	139 1.0×	53	1.4k
Andrea Sartori Italy	28	1.3k 0.9×	610 1.6×	225 0.8×	163 1.1×	254 1.7×	77	2.1k
Chunling Fu China	40	4.1k 2.7×	584 1.6×	683 2.4×	82 0.5×	267 1.8×	199	5.3k
Guo‐Liang Lu China	27	1.1k 0.7×	400 1.1×	466 1.6×	427 2.8×	442 3.0×	135	2.3k
Joël Robichaud Canada	20	387 0.3×	320 0.9×	77 0.3×	192 1.3×	375 2.6×	32	1.2k
Alfred Pollak Slovenia	22	521 0.3×	571 1.5×	179 0.6×	96 0.6×	364 2.5×	70	1.6k
Tsuyoshi Ueda Japan	24	1.0k 0.7×	605 1.6×	281 1.0×	430 2.8×	508 3.5×	72	2.3k
Jered C. Garrison United States	23	1.8k 1.2×	288 0.8×	345 1.2×	32 0.2×	165 1.1×	71	2.8k
Fei Liu China	27	1.2k 0.8×	697 1.9×	285 1.0×	65 0.4×	277 1.9×	103	2.3k

Countries citing papers authored by Koji Sumitani

Since Specialization

Citations

This map shows the geographic impact of Koji Sumitani's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Koji Sumitani with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koji Sumitani more than expected).

Fields of papers citing papers by Koji Sumitani

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Koji Sumitani. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Koji Sumitani. The network helps show where Koji Sumitani may publish in the future.

Co-authorship network of co-authors of Koji Sumitani

This figure shows the co-authorship network connecting the top 25 collaborators of Koji Sumitani. A scholar is included among the top collaborators of Koji Sumitani based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Koji Sumitani. Koji Sumitani is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ohba, Yasuo, et al.. (1997). Prodigiosin 25-C and Metacycloprodigiosin Suppress the Bone Resorption by Osteoclasts. Bioscience Biotechnology and Biochemistry. 61(2). 400–402. 9 indexed citations

Ohba, Yasuo, Koji Sumitani, Kenji Hiura, et al.. (1996). Inhibitory mechanisms of H⁺‐ATPase inhibitor bafilomycin A₁ and carbonic anhydrase II inhibitor acetazolamide on experimental bone resorption. FEBS Letters. 387(2-3). 175–178. 16 indexed citations

Ohba, Yasuo, et al.. (1996). Concanamycin B, a Vacuolar H+-ATPase Specific Inhibitor Suppresses Bone Resorption in Vitro.. Biological and Pharmaceutical Bulletin. 19(2). 297–299. 13 indexed citations

Woo, Je‐Tae, Kohji Yamaguchi, Takeo Kobori, et al.. (1996). Suppressive effect of N-(benzyloxycarbonyl)-l-phenylalanyl-l-tyrosinal on bone resorption in vitro and in vivo. European Journal of Pharmacology. 300(1-2). 131–135. 29 indexed citations

Sato, Takuya, Yoshiyuki Hakeda, Yuji Yamaguchi, et al.. (1995). Hepatocyte growth factor is involved in formation of osteoclast‐like cells mediated by clonal stromal cells (MC3T3‐G2/PA6). Journal of Cellular Physiology. 164(1). 197–204. 42 indexed citations

Kakegawa, Hisao, et al.. (1995). Secretion and processing mechanisms of procathepsin L in bone resorption. FEBS Letters. 370(1-2). 78–82. 24 indexed citations

Kamioka, Hiroshi, Koji Sumitani, Keiko Tagami, et al.. (1995). Extracellular Calcium Causes the Release of Calcium from Intracellular Stores in Chick Osteocytes. Biochemical and Biophysical Research Communications. 212(2). 692–696. 18 indexed citations

Kamioka, Hiroshi, Kayo Tanaka, Takuya Sato, et al.. (1995). Effects of transforming growth factor-β1 on formation and activation of osteoclasts. Journal of Bone and Mineral Metabolism. 13(1). 3–9. 1 indexed citations

Kamioka, Hiroshi, Koji Sumitani, Keiko Tagami, et al.. (1994). Divalent Cations Elevate Cytosolic Calcium of Chick Osteocytes. Biochemical and Biophysical Research Communications. 204(2). 519–524. 10 indexed citations

10.

Kakegawa, Hisao, Hiroshi Kamioka, Koji Sumitani, et al.. (1994). The mechanisms and regulation of procathepsin L secretion from osteoclasts in bone resorption. FEBS Letters. 342(3). 308–312. 24 indexed citations

11.

Kakegawa, Hisao, Takeshi Nikawa, Hiroshi Kamioka, et al.. (1993). Participation of cathepsin L on bone resorption. FEBS Letters. 321(2-3). 247–250. 115 indexed citations

12.

Hiura, Kenji, et al.. (1991). Mouse Osteoblastic Cells (MC3T3-E1) at Different Stages of Differentiation Have Opposite Effects on Osteoclastic Cell Formation. Endocrinology. 128(3). 1630–1637. 29 indexed citations

13.

Ishizuka, Seiichi, et al.. (1990). Biological Activity Assessment of lα,25- Dihydroxyvitamin D₃-26,23-Lactone and Its Intermediate Metabolitesin Vivoandin Vitro. Endocrinology. 127(2). 695–701. 15 indexed citations

14.

Eguchi, Tadashi, N. IKEKAWA, Koji Sumitani, et al.. (1990). Effect on carbon lengthening at the side chain terminal of 1.ALPHA.,25-dihydroxyvitamin D3 for calcium regulating activity.. Chemical and Pharmaceutical Bulletin. 38(5). 1246–1249. 10 indexed citations

15.

Sumitani, Koji, Terushige Kawata, Tanihiro Yoshimoto, Shozo Yamamoto, & Masayoshi Kumegawa. (1989). Fatty acid cyclooxygenase activity stimulated by transforming growth factor-β in mouse osteoblastic cells (MC3T3-E1). Archives of Biochemistry and Biophysics. 270(2). 588–595. 37 indexed citations

16.

Yamamoto, Shogo, Tomoko Oshima, Masami Kusaka, et al.. (1989). Molecular mechanism of cyclooxygenase regulation in cloned mouse osteoblastic cell (MC3T3-E1).. PubMed. 19. 444–9. 2 indexed citations

17.

Tamao, Kohei, Koji Sumitani, Yoshihisa Kiso, et al.. (1976). ChemInform Abstract: NICKEL‐PHOSPHINE COMPLEX‐CATALYZED GRIGNARD COUPLING. I. CROSS‐COUPLING OF ALKYL, ARYL, AND ALKENYL GRIGNARD REAGENTS WITH ARYL AND ALKENYL HALIDES‐ GENERAL SCOPE AND LIMITATIONS. Chemischer Informationsdienst. 7(42). 1 indexed citations

18.

Tamao, Kohei, Koji Sumitani, Yoshihisa Kiso, et al.. (1976). Nickel-Phosphine Complex-Catalyzed Grignard Coupling. I. Cross-Coupling of Alkyl, Aryl, and Alkenyl Grignard Reagents with Aryl and Alkenyl Halides: General Scope and Limitations. Bulletin of the Chemical Society of Japan. 49(7). 1958–1969. 499 indexed citations breakdown →

19.

Tamao, Kohei, Koji Sumitani, & Makoto Kumada. (1972). Selective carbon-carbon bond formation by cross-coupling of Grignard reagents with organic halides. Catalysis by nickel-phosphine complexes. Journal of the American Chemical Society. 94(12). 4374–4376. 988 indexed citations breakdown →

20.

Tamao, Kohei, Yoshihisa Kiso, Koji Sumitani, & Makoto Kumada. (1972). Alkyl group isomerization in the cross-coupling reaction of secondary alkyl Grignard reagents with organic halides in the presence of nickel-phosphine complexes as catalysts. Journal of the American Chemical Society. 94(26). 9268–9269. 163 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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