Takeharu Koga

1.0k total citations
53 papers, 763 citations indexed

About

Takeharu Koga is a scholar working on Pulmonary and Respiratory Medicine, Epidemiology and Surgery. According to data from OpenAlex, Takeharu Koga has authored 53 papers receiving a total of 763 indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Pulmonary and Respiratory Medicine, 16 papers in Epidemiology and 12 papers in Surgery. Recurrent topics in Takeharu Koga's work include Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis (8 papers), Asthma and respiratory diseases (7 papers) and Streptococcal Infections and Treatments (5 papers). Takeharu Koga is often cited by papers focused on Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis (8 papers), Asthma and respiratory diseases (7 papers) and Streptococcal Infections and Treatments (5 papers). Takeharu Koga collaborates with scholars based in Japan, United States and South Africa. Takeharu Koga's co-authors include Hisamichi Aizawa, Toru Rikimaru, Kōtaro Ōizumi, Dwight C. Look, Michael J. Holtzman, Masaharu Kinoshita, T. Kamimura, Hideyuki Koga, Mitsuyoshi Ayabe and Kiminori Fujimoto and has published in prestigious journals such as New England Journal of Medicine, Proceedings of the National Academy of Sciences and The Journal of Experimental Medicine.

In The Last Decade

Takeharu Koga

50 papers receiving 742 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Takeharu Koga Japan 15 355 232 156 143 130 53 763
Karen L. Wood United States 13 273 0.8× 175 0.8× 228 1.5× 111 0.8× 54 0.4× 22 652
Mineharu Sugimoto Japan 19 632 1.8× 328 1.4× 343 2.2× 220 1.5× 246 1.9× 62 1.1k
Elaine J. Clutterbuck United Kingdom 12 161 0.5× 226 1.0× 120 0.8× 270 1.9× 145 1.1× 17 840
Elissa Murphy United States 9 696 2.0× 156 0.7× 179 1.1× 60 0.4× 45 0.3× 17 959
Peter van Swieten Netherlands 19 85 0.2× 243 1.0× 172 1.1× 247 1.7× 116 0.9× 30 1.3k
Masaharu Kawabata Japan 16 248 0.7× 76 0.3× 120 0.8× 424 3.0× 56 0.4× 38 981
Hendrik Schultz Germany 14 182 0.5× 62 0.3× 77 0.5× 205 1.4× 163 1.3× 28 612
K Oizumi Japan 16 144 0.4× 92 0.4× 207 1.3× 210 1.5× 38 0.3× 61 712
Robert Hostoffer United States 15 125 0.4× 81 0.3× 156 1.0× 421 2.9× 78 0.6× 102 822
Helena Alves Portugal 17 86 0.2× 89 0.4× 86 0.6× 217 1.5× 151 1.2× 60 811

Countries citing papers authored by Takeharu Koga

Since Specialization
Citations

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

Fields of papers citing papers by Takeharu Koga

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takeharu Koga

This figure shows the co-authorship network connecting the top 25 collaborators of Takeharu Koga. A scholar is included among the top collaborators of Takeharu Koga 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 Takeharu Koga. Takeharu Koga 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.
Koga, Takeharu, Toru Rikimaru, Naoto Tokunaga, et al.. (2011). Evaluation of short-term clinical efficacy of 3-day therapy with azithromycin in comparison with 5-day cefcapene-pivoxyl for acute streptococcal tonsillopharyngitis in primary care. Journal of Infection and Chemotherapy. 17(4). 499–503. 5 indexed citations
2.
Koga, Takeharu, et al.. (2011). Comparison of Leukotriene Receptor Antagonists and Anti-Histamines as an Add-On Therapy in Patients with Asthma Complicated by Allergic Rhinitis. The Kurume Medical Journal. 58(1). 9–14. 2 indexed citations
3.
Koga, Takeharu, et al.. (2011). Concurrent Lung Cancer in Non-Tuberculous Mycobacteriosis: Case Report. The Kurume Medical Journal. 58(3). 87–90. 4 indexed citations
4.
Koga, Takeharu, et al.. (2010). Complex Cystic Lung Lesion Presenting in a 41-Year-Old Woman. CHEST Journal. 138(1). 208–212. 1 indexed citations
5.
Koga, Takeharu, et al.. (2009). Pseudo-Meigs’Syndrome as a Cause of Exertional Dyspnea: A Case Report. The Kurume Medical Journal. 56(3/4). 85–87. 1 indexed citations
6.
Rikimaru, Toru, et al.. (2008). Nursing-home-acquired Pneumococcal Pneumonia. Kansenshogaku zasshi. 82(6). 628–632. 1 indexed citations
7.
Johkoh, Takeshi, Hiromitsu Sumikawa, Osamu Honda, et al.. (2007). Acute eosinophilic pneumonia: Thin-section CT findings in 29 patients. European Journal of Radiology. 65(3). 462–467. 54 indexed citations
8.
Maruoka, Hiroshi, et al.. (2007). Recurrent thrombotic thrombocytopenic purpura in a patient with systemic lupus erythematosus. Modern Rheumatology. 17(5). 426–428. 3 indexed citations
9.
Koga, Takeharu, et al.. (2006). Exophiala dermatitidis infection in non-cystic fibrosis bronchiectasis. Respiratory Medicine. 100(11). 2069–2071. 27 indexed citations
10.
Koga, Takeharu, et al.. (2006). Determinants of Bronchodilator Responsiveness in Patients with Controlled Asthma. Journal of Asthma. 43(1). 71–74. 16 indexed citations
11.
Kamimura, T., et al.. (2006). Prevalence of Previously Undiagnosed Airflow Limitation in Patients Who Underwent Preoperative Pulmonary Function Test. The Kurume Medical Journal. 53(3/4). 53–57. 4 indexed citations
12.
Koga, Takeharu, Kimio Ushijima, Masayoshi Kage, et al.. (2006). Pulmonary Metastasis of Endometrial Stromal Sarcoma. The Kurume Medical Journal. 53(3/4). 95–97.
13.
Koga, Takeharu, et al.. (2005). Characterisation of patients with frequent exacerbation of asthma. Respiratory Medicine. 100(2). 273–278. 48 indexed citations
14.
Terasaki, Hiroshi, Kiminori Fujimoto, Néstor L. Müller, et al.. (2005). Pulmonary Sarcoidosis: Comparison of Findings of Inspiratory and Expiratory High-Resolution CT and Pulmonary Function Tests Between Smokers and Nonsmokers. American Journal of Roentgenology. 185(2). 333–338. 23 indexed citations
15.
Koga, Takeharu, et al.. (2005). Chronic pulmonary scedosporiosis simulating aspergillosis. Respirology. 10(5). 682–684. 19 indexed citations
16.
Kitasato, Yasuhiko, Tomoaki Hoshino, Masaki Okamoto, et al.. (2004). Enhanced Expression of Interleukin-18 and its Receptor in Idiopathic Pulmonary Fibrosis. American Journal of Respiratory Cell and Molecular Biology. 31(6). 619–625. 79 indexed citations
17.
Kinoshita, Masaharu, et al.. (1999). Churg-Strauss syndrome after corticosteroid withdrawal in an asthmatic patient treated with pranlukast. Journal of Allergy and Clinical Immunology. 103(3). 534–535. 66 indexed citations
18.
Koga, Takeharu, Takafumi Yano, Yoichiro Ichikawa, Kōtaro Ōizumi, & Manabu Mochizuki. (1993). Pulmonary Infiltrates Recovered by FK506 in a Patient with Behçet’s Disease. CHEST Journal. 104(1). 309–311. 35 indexed citations
19.
Koga, Takeharu, et al.. (1992). A 72-year-old Female with Adult Still's Disease.. Internal Medicine. 31(12). 1356–1358. 13 indexed citations
20.
Koga, Takeharu, et al.. (1990). A case of Lambert-Eaton myasthenic syndrome accompanied by a small cell carcinoma of the lung.. The Kurume Medical Journal. 37(2). 117–120. 1 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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