Junichi Koyama

1.4k total citations
34 papers, 1.1k citations indexed

About

Junichi Koyama is a scholar working on Dermatology, Pharmaceutical Science and Insect Science. According to data from OpenAlex, Junichi Koyama has authored 34 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Dermatology, 14 papers in Pharmaceutical Science and 7 papers in Insect Science. Recurrent topics in Junichi Koyama's work include Advancements in Transdermal Drug Delivery (14 papers), Dermatology and Skin Diseases (13 papers) and Bee Products Chemical Analysis (7 papers). Junichi Koyama is often cited by papers focused on Advancements in Transdermal Drug Delivery (14 papers), Dermatology and Skin Diseases (13 papers) and Bee Products Chemical Analysis (7 papers). Junichi Koyama collaborates with scholars based in Japan and United States. Junichi Koyama's co-authors include Izumi Horii, Junko Sato, Mitsuhiro Denda, Junko Nomura, Yumiko Suzuki, Toru Tsuchiya, Jotaro Nakanishi, Hachiro Tagami, Masanori Takahashi and Yoshiko Masuda and has published in prestigious journals such as Brain Research, FEBS Letters and Journal of Chromatography A.

In The Last Decade

Junichi Koyama

34 papers receiving 1.0k citations

Peers

Countries citing papers authored by Junichi Koyama

Since Specialization

Citations

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

Fields of papers citing papers by Junichi Koyama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Junichi Koyama

This figure shows the co-authorship network connecting the top 25 collaborators of Junichi Koyama. A scholar is included among the top collaborators of Junichi Koyama 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 Junichi Koyama. Junichi Koyama 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

#	Work	Indexed citations
1	Highly Sensitive and Rapid Flow-injection Fluorometric Determination of Lipid Hydroperoxide in Human Sebum 2012 ·BUNSEKI KAGAKU ·(unknown), Junichi Koyama, (unknown)	1
2	Keratinocytes Synthesize Enteropeptidase and Multiple Forms of Trypsinogen during Terminal Differentiation 2009 ·Journal of Investigative Dermatology ·Jotaro Nakanishi, Mami Yamamoto, Junichi Koyama, Junko Sato, Toshihiko Hibino	25
3	The Mechanism of Desquamation in the Stratum Corneum and Its Relevance to Skin Care. 1999 ·Journal of Society of Cosmetic Chemists of Japan ·Junichi Koyama, Jotaro Nakanishi, Junko Sato, Junko Nomura, Yumiko Suzuki, Yoshiko Masuda, Yasuhisa Nakayama	9
4	Cholesterol Sulfate Inhibits Proteases that are Involved in Desquamation of Stratum Corneum 1998 ·Journal of Investigative Dermatology ·Junko Sato, (unknown), Jotaro Nakanishi, Junko Nomura, Junichi Koyama	81
5	Exposure to a Dry Environment Enhances Epidermal Permeability Barrier Function 1998 ·Journal of Investigative Dermatology ·Mitsuhiro Denda, Junko Sato, Yoshiko Masuda, Toru Tsuchiya, Junichi Koyama, (unknown), Peter M. Elias, Kenneth R. Feingold	177
6	Dry condition affects desquamation of stratum corneum in vivo 1998 ·Journal of Dermatological Science ·Junko Sato, (unknown), Jotaro Nakanishi, Junichi Koyama	46
7	Loss of water from the stratum corneum induces epidermal DNA synthesis in hairless mice 1998 ·Archives of Dermatological Research ·Junko Sato, Mitsuhiro Denda, Yutaka Ashida, Junichi Koyama	22
8	Modulatory effect of l-NAME, a specific nitric oxide synthase (NOS) inhibitor, on stress-induced changes in plasma adrenocorticotropic hormone (ACTH) and corticosterone levels in rats: physiological significance of stress-induced NOS activation in hypothalamic–pituitary–adrenal axis 1997 ·Brain Research ·Toru Tsuchiya, Jiro Kishimoto, Junichi Koyama, (unknown)	56
9	The role of two endogenous proteases of the stratum corneum in degradation of desmoglein-1 and their reduced activity in the skin of ichthyotic patients 1996 ·British Journal of Dermatology ·Yumiko Suzuki, Junichi Koyama, Osamu Moro, (unknown), Katsuko Kikuchi, (unknown), Hachiro Tagami	49
10	The role of proteases in stratum corneum: involvement in stratum corneum desquamation 1994 ·Archives of Dermatological Research ·Yumiko Suzuki, Junko Nomura, Junichi Koyama, Izumi Horii	76
11	Stratum corneum lipid morphology and transepidermal water loss in normal skin and surfactant-induced scaly skin 1994 ·Archives of Dermatological Research ·Mitsuhiro Denda, Junichi Koyama, Ryûjirô Namba, Izumi Horii	44
12	Detection and characterization of endogenous protease associated with desquamation of stratum corneum 1993 ·Archives of Dermatological Research ·Yumiko Suzuki, Junko Nomura, (unknown), Junichi Koyama, Masanori Takahashi, Izumi Horii	68
13	Functional assessment of the stratum corneum under the influence of oral aromatic retinoid (etretinate) in guinea-pigs and humans. Comparison with topical retinoic acid treatment 1992 ·British Journal of Dermatology ·Hachiro Tagami, Tsugio Tadaki, M. Obata, Junichi Koyama	31
14	Stratum corneum sphingolipids and free amino acids in experimentally-induced scaly skin 1992 ·Archives of Dermatological Research ·Mitsuhiro Denda, (unknown), Junichi Koyama, Seiichi Yoshida, (unknown), Masanori Takahashi, Izumi Horii, Akiyuki Yamamoto	48
15	Effect of column length and elution mechanism on the separation of proteins by reversed-phase high-performance liquid chromatography 1992 ·Journal of Chromatography A ·Junichi Koyama, Junko Nomura, (unknown), Yutaka Ohtsu, Izumi Horii	15
16	Amino acid sequences of nerve growth factors derived from cobra venoms 1991 ·FEBS Letters ·S Inoué, Toshio Oda, Junichi Koyama, Kiyoshi Ikeda, Kyozo Hayashi	18
17	Analysis of peptides under alkaline conditions using newly developed "capsule type" silica gel. 1989 ·NIPPON KAGAKU KAISHI ·Junichi Koyama, (unknown), Yutaka Ohtsu, (unknown), Hiroshi Fukui, (unknown)	3
18	Performance of polymer-coated silica C18 packing materials prepared from high-purity silica gel 1989 ·Journal of Chromatography A ·Yutaka Ohtsu, (unknown), (unknown), Junichi Koyama, Kiyoshi Nakamura, (unknown), Kazuhiro Kimata, Nobuo Tanaka	87
19	Free amino acids of stratum corneum as a biochemical marker to evaluate dry skin 1984 ·Junichi Koyama, Izumi Horii, Kiyoshi Kawasaki, Yasuhisa Nakayama, Yoshihiro Morikawa, (unknown), (unknown)	34
20	1981 ·Journal of Society of Cosmetic Chemists of Japan ·Junichi Koyama, Yoshihiro Morikawa, Isao Matsumoto	1

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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