Keiji Kojima

765 total citations
60 papers, 551 citations indexed

About

Keiji Kojima is a scholar working on Mechanics of Materials, Pulmonary and Respiratory Medicine and Ocean Engineering. According to data from OpenAlex, Keiji Kojima has authored 60 papers receiving a total of 551 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Mechanics of Materials, 9 papers in Pulmonary and Respiratory Medicine and 9 papers in Ocean Engineering. Recurrent topics in Keiji Kojima's work include Sexual function and dysfunction studies (9 papers), Hormonal and reproductive studies (5 papers) and Groundwater flow and contamination studies (5 papers). Keiji Kojima is often cited by papers focused on Sexual function and dysfunction studies (9 papers), Hormonal and reproductive studies (5 papers) and Groundwater flow and contamination studies (5 papers). Keiji Kojima collaborates with scholars based in Japan, United States and United Kingdom. Keiji Kojima's co-authors include Hiro‐omi Kanayama, Akira Numata, Jerzy Szumowski, Robert C. Sheley, Stephen Quinn, Daisuke Miyamoto, Hiroyuki Tosaka, Keitaro Yoshimoto, Kazunori Kimura and Yukio Nagasaki and has published in prestigious journals such as Cancer, Langmuir and Radiology.

In The Last Decade

Keiji Kojima

50 papers receiving 507 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Keiji Kojima Japan 13 150 117 88 76 75 60 551
Tetsuo Okuno Japan 15 156 1.0× 162 1.4× 41 0.5× 44 0.6× 133 1.8× 45 488
Qijie Zhang China 16 82 0.5× 129 1.1× 70 0.8× 48 0.6× 35 0.5× 78 700
O. Nishizawa Japan 17 59 0.4× 41 0.4× 16 0.2× 20 0.3× 150 2.0× 54 765
Abhishek Agrawal India 14 112 0.7× 65 0.6× 31 0.4× 27 0.4× 4 0.1× 59 648
Antonio Cavallaro Italy 16 138 0.9× 71 0.6× 11 0.1× 49 0.6× 26 0.3× 53 786
Yucong Zhang China 18 143 1.0× 379 3.2× 33 0.4× 41 0.5× 141 1.9× 100 966
A. Klein Israel 9 98 0.7× 19 0.2× 5 0.1× 53 0.7× 26 0.3× 28 758
B. Schwaighofer Austria 16 233 1.6× 148 1.3× 46 0.5× 26 0.3× 3 0.0× 45 640
Xiang Liu China 16 355 2.4× 233 2.0× 5 0.1× 28 0.4× 9 0.1× 94 747

Countries citing papers authored by Keiji Kojima

Since Specialization
Citations

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

Fields of papers citing papers by Keiji Kojima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiji Kojima

This figure shows the co-authorship network connecting the top 25 collaborators of Keiji Kojima. A scholar is included among the top collaborators of Keiji Kojima 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 Keiji Kojima. Keiji Kojima 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.
Kojima, Keiji, et al.. (2009). 50 Years Experiences of Engineering Geology in Tokyo Bay Area. Journal of the Japan Society of Engineering Geology. 50(3). 126–139. 1 indexed citations
2.
Hasegawa, Makoto, et al.. (2007). SIMPLIFIED CRITERIA FOR DAILY INSPECTION OF WATER-SEALING FUNCTION STABILITY OF UNDERGROUND OIL CAVERN. Doboku Gakkai Ronbunshuu C. 63(2). 624–634. 1 indexed citations
3.
Ukida, Hiroyuki, et al.. (2006). Color Restoration Methods for Scanned Book Images. 295–300.
4.
Araki, Tadashi, et al.. (2004). J-027 Distortion Correction Method for Scanned Book English Images. 3(3). 265–266.
5.
Kimura, Kazunori, et al.. (2004). Penile revascularization surgery for arteriogenic erectile dysfunction: the long‐term efficacy rate calculated by survival analysis. British Journal of Urology. 94(3). 361–368. 19 indexed citations
6.
Araki, Tadashi, et al.. (2001). Image Correction Method for Scanned Book Images Using Ruled Lines and Characters. 2001. 169.
7.
Koizumi, Takahiro, et al.. (2001). TREATMENT OF PHIMOSIS WITH BETAMETHASONE OINTMENT IN CHILDREN. The Japanese Journal of Urology. 92(6). 619–623. 4 indexed citations
8.
Kawanishi, Y, et al.. (2001). Feasibility of multi‐slice computed tomography in the diagnosis of arteriogenic erectile dysfunction. British Journal of Urology. 88(4). 390–395. 28 indexed citations
9.
10.
Kimura, Kazunori, Kunihisa Yamaguchi, Hiroyoshi Nakatsuji, et al.. (2000). ISCHEMIC HEART DISEASE IN PATIENTS WITH ERECTILE DYSFUNCTION. The Japanese Journal of Urology. 91(12). 708–714. 3 indexed citations
11.
Kimura, Kazunori, Kunihisa Yamaguchi, Hiroyoshi Nakatsuji, et al.. (2000). MICROSURGICAL PENILE REVASCULARIZATION IN PATIENTS WITH PURE ARTERIOGENIC ERECTILE DYSFUNCTION. The Japanese Journal of Urology. 91(2). 62–68. 3 indexed citations
12.
Basoglu, Chris, Robert Gove, Keiji Kojima, & J. M. O’Donnell. (1999). Single‐chip processor for media applications: the MAP1000™. International Journal of Imaging Systems and Technology. 10(1). 96–106. 6 indexed citations
13.
Tosaka, Hiroyuki, et al.. (1998). New Algorithm for Identifying Hydraulic Property Distribution of Rock Mass by Simultaneous Fitting of Pressure and Its Change Rate at Multi-Points in Multi-Wells. Journal of Groundwater Hydrology. 40(3). 273–287. 4 indexed citations
14.
Tosaka, Hiroyuki, et al.. (1998). Can we properly model secondary migration in basin simulation?. Journal of the Japanese Association for Petroleum Technology. 63(1). 52–64. 1 indexed citations
15.
Haraguchi, Tsuyoshi, et al.. (1998). A New Sampling Method of Unconsolidated Sediments by Long Geo-slicer, a Pile-type Soil Sampler.. Journal of the Japan Society of Engineering Geology. 39(3). 306–314. 12 indexed citations
16.
Kurokawa, Yasushi, Keiji Kojima, Susumu Kagawa, Kazushi Minami, & Yutaka Nakaya. (1998). Biphasic Action of Phenylephrine on the Ca<sup>2+</sup>-Activated K<sup>+</sup> Channel of Human Prostatic Smooth Muscle Cells. Urologia Internationalis. 60(3). 156–160. 10 indexed citations
17.
Tosaka, Hiroyuki, et al.. (1996). Comprehensive Treatment of Groundwater Pollution by Multi-component, Multi-phase Convection/Diffusion Modeling. Journal of Groundwater Hydrology. 38(3). 167–180. 4 indexed citations
18.
Kojima, Keiji, et al.. (1996). Serological Evaluation of Soluble CD44 in Renal Cancer. Japanese Journal of Cancer Research. 87(11). 1191–1194. 14 indexed citations
19.
Tosaka, Hiroyuki, et al.. (1993). Hydropulse Tomography for Identifying 3-D Permeability Distribution. High Level Radioactive Waste Management. 955–959. 22 indexed citations
20.
Okamoto, Ryuichi, et al.. (1981). Distribution And Engineering Properties of Weak Rocks In Japan. ISRM International Symposium. 7 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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