K Hamana

1.5k total citations · 1 hit paper
34 papers, 1.3k citations indexed

About

K Hamana is a scholar working on Molecular Biology, Biochemistry and Ecology. According to data from OpenAlex, K Hamana has authored 34 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 32 papers in Molecular Biology, 16 papers in Biochemistry and 7 papers in Ecology. Recurrent topics in K Hamana's work include Polyamine Metabolism and Applications (24 papers), Amino Acid Enzymes and Metabolism (16 papers) and Methane Hydrates and Related Phenomena (6 papers). K Hamana is often cited by papers focused on Polyamine Metabolism and Applications (24 papers), Amino Acid Enzymes and Metabolism (16 papers) and Methane Hydrates and Related Phenomena (6 papers). K Hamana collaborates with scholars based in Japan and United States. K Hamana's co-authors include Masashi Takeuchi, Akira Hiraishi, Takeshi Sakane, Kazuhide Yamasato, Akira Yokota, Koichi Iwai, Eikichi Hashimoto, Yasutomi Nishizuka, Masao Takeda and Cynthia R. Wagner and has published in prestigious journals such as Journal of Biological Chemistry, Molecular and Cellular Biology and Biochemical Journal.

In The Last Decade

K Hamana

34 papers receiving 1.3k citations

Hit Papers

Proposal of the genus Sphingomonas sensu stricto and thre... 2001 2026 2009 2017 2001 200 400 600
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.

  1. Proposal of the genus Sphingomonas sensu stricto and three new genera, Sphingobium, Novosphingobium and Sphingopyxis, on the basis of phylogenetic and chemotaxonomic analyses.
    2001 670 citations Masashi Takeuchi, K Hamana et al. INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
K Hamana Japan 13 981 502 302 160 123 34 1.3k
Montserrat Argandoña Spain 19 679 0.7× 322 0.6× 222 0.7× 78 0.5× 33 0.3× 26 1.1k
Bjarne Landfald Norway 16 685 0.7× 277 0.6× 197 0.7× 97 0.6× 40 0.3× 23 1.3k
Kyung Hyun Kim South Korea 20 808 0.8× 303 0.6× 244 0.8× 72 0.5× 56 0.5× 80 1.4k
Rose Adele Monteiro Brazil 26 816 0.8× 307 0.6× 1.1k 3.7× 180 1.1× 94 0.8× 85 1.9k
Curtis A. Carlson United States 15 686 0.7× 282 0.6× 108 0.4× 170 1.1× 151 1.2× 18 1.3k
Nathanaël Delmotte Switzerland 15 745 0.8× 349 0.7× 949 3.1× 81 0.5× 188 1.5× 20 1.8k
David Cánovas Spain 25 1.1k 1.1× 378 0.8× 517 1.7× 296 1.9× 195 1.6× 53 2.2k
Hyung-Yeel Kahng South Korea 20 540 0.6× 341 0.7× 142 0.5× 376 2.4× 30 0.2× 63 1.0k
Jun Kai Zhang United States 16 978 1.0× 263 0.5× 116 0.4× 126 0.8× 25 0.2× 19 1.4k
Jean‐Alain Pocard France 12 324 0.3× 121 0.2× 474 1.6× 68 0.4× 87 0.7× 13 876

Countries citing papers authored by K Hamana

Since Specialization
Citations

This map shows the geographic impact of K Hamana'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 K Hamana with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K Hamana more than expected).

Fields of papers citing papers by K Hamana

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by K Hamana. 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 K Hamana. The network helps show where K Hamana may publish in the future.

Co-authorship network of co-authors of K Hamana

This figure shows the co-authorship network connecting the top 25 collaborators of K Hamana. A scholar is included among the top collaborators of K Hamana 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 K Hamana. K Hamana is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
2.
3.
4.
Ichimura, Sachiko, et al.. (2004). Accumulation of spermidine/spermine N1‐acetyltransferase and alternatively spliced mRNAs as a delayed response of HeLa S3 cells following X‐ray irradiation. International Journal of Radiation Biology. 80(5). 369–375. 9 indexed citations
5.
Takeuchi, Masashi, K Hamana, & Akira Hiraishi. (2001). Proposal of the genus Sphingomonas sensu stricto and three new genera, Sphingobium, Novosphingobium and Sphingopyxis, on the basis of phylogenetic and chemotaxonomic analyses.. INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY. 51(4). 1405–1417. 670 indexed citations breakdown →
6.
Hamana, K, Tomoko Saito, & M Okada. (2000). Polyamine profiles within the beta subclass of the class Proteobacteria: Distribution of 2-hydroxyputrescine. 9 indexed citations
7.
Hamana, K, et al.. (2000). Distribution of diaminopropane, putrescine and cadaverine in Haemophilus and Actinobacillus.. PubMed. 103(404). 43–51. 4 indexed citations
8.
Hamana, K, et al.. (1999). Aquifex属、Thermodesulfobacterium属、サーマス属およびMeiothermus属に属する好熱性真正細菌ならびにSulfurisphaera属、Sulfophobococcus属、Stetteria属、Thermocladium属、パイロコッカス属、サーモコッカス属、Methanopyrus属およびMethanothermus属に属する好熱性古細菌のポリアミン. 97(387). 117–130. 8 indexed citations
9.
Hamana, K, et al.. (1998). Thermotoga属、Thermodesulfovibrio属、Thermoleophilum属、Thermus属、Rhodothermus属とMeiothermus属に属する好熱性真正細菌およびAeropyrum属、Picrophilus属、メタノバクテリウム属とメタノコックス属に属する好熱性古細菌のポリアミン. 94(377). 7–21. 21 indexed citations
10.
Hamana, K. (1997). Polyamines of thermophilic phototrophs, Chloroflexus and Chlorobium, and the phylogenetically related non-phototrophs, filamentous gliding Herpetosiphon and iron-oxidizing 'Leptospirillum'. 91(366). 27–35. 2 indexed citations
11.
Hamana, K, Hiroshi Hamana, & Takashi Itoh. (1995). Polyamines in the hydrogen-oxidizing eubacteria Hydrogenobacter, Calderobacterium and Hydrogenovibrio and the sulphur-reducing archaebacteria Stygiolobus and Desulfurolobus. 81(329). 223–229. 6 indexed citations
12.
Takeuchi, Masashi, Takeshi Sakane, Miyoko Yanagi, et al.. (1995). Taxonomic Study of Bacteria Isolated from Plants: Proposal of Sphingomonas rosa sp. nov., Sphingomonas pruni sp. nov., Sphingomonas asaccharolytica sp. nov., and Sphingomonas mali sp. nov.. International Journal of Systematic Bacteriology. 45(2). 334–341. 130 indexed citations
13.
Hamana, K, et al.. (1994). Occurrence of tertiary and quaternary branched polyamines in thermophilic archaebacteria.. PubMed. 79(319). 109–19. 20 indexed citations
14.
Hamana, K. (1990). Polyamines in Rhizobium, Bradyrhizobium, Azorhizobium and Argobacterium. FEMS Microbiology Letters. 71(1-2). 71–76. 15 indexed citations
15.
Hamana, K. (1990). Synthesis of novel polyamines in Paracoccus, Rhodobacter and Micrococcus. FEMS Microbiology Letters. 67(3). 267–273. 2 indexed citations
16.
Hamana, K. (1989). Polyamine distribution and the potential to form novel polyamines in phytopathogenic agrobacteria. FEMS Microbiology Letters. 65(3). 269–274. 2 indexed citations
17.
Hamana, K. (1989). Interconversion of polyamines in wild-type strains and mutants of yeasts and the effects of polyamines on their growth. FEMS Microbiology Letters. 61(1-2). 231–236. 3 indexed citations
18.
Hamana, K, et al.. (1988). Distribution of sym-homosperimidine in eubacteria, cyanobacteria, algae and ferns. FEMS Microbiology Letters. 50(1). 11–16. 27 indexed citations
19.
Hamana, K. (1987). Distribution of polyamines in actinomycetes. FEMS Microbiology Letters. 41(3). 211–215. 1 indexed citations
20.
Matsuzaki, Shinya, et al.. (1987). Occurrence of aminopropylhomospermidine and canavalmine in the hamster epididymis.. PubMed. 15(4). 817–22. 12 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Montserrat Argandoña Breakdown of academic impact, for papers by Bjarne Landfald Breakdown of academic impact, for papers by Kyung Hyun Kim Breakdown of academic impact, for papers by Rose Adele Monteiro Breakdown of academic impact, for papers by Curtis A. Carlson Breakdown of academic impact, for papers by Nathanaël Delmotte Breakdown of academic impact, for papers by David Cánovas Breakdown of academic impact, for papers by Hyung-Yeel Kahng Breakdown of academic impact, for papers by Jun Kai Zhang Breakdown of academic impact, for papers by Jean‐Alain Pocard
Rankless by CCL
2026