N. Iwai

3.0k total citations
170 papers, 2.1k citations indexed

About

N. Iwai is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Electrical and Electronic Engineering. According to data from OpenAlex, N. Iwai has authored 170 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 81 papers in Surgery, 45 papers in Pulmonary and Respiratory Medicine and 39 papers in Electrical and Electronic Engineering. Recurrent topics in N. Iwai's work include Semiconductor Lasers and Optical Devices (37 papers), Photonic and Optical Devices (34 papers) and Semiconductor Quantum Structures and Devices (30 papers). N. Iwai is often cited by papers focused on Semiconductor Lasers and Optical Devices (37 papers), Photonic and Optical Devices (34 papers) and Semiconductor Quantum Structures and Devices (30 papers). N. Iwai collaborates with scholars based in Japan, United States and Egypt. N. Iwai's co-authors include Tadashi Inagami, Masahiko Kinoshita, Yasuyuki Nakamura, Nobuyuki Ohmichi, K. Tokiwa, A. Kasukawa, Takashi Shimotake, Osamu Kimura, Yoshito Itoh and Jun Yanagihara and has published in prestigious journals such as Circulation, SHILAP Revista de lepidopterología and Gastroenterology.

In The Last Decade

N. Iwai

153 papers receiving 2.0k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
N. Iwai Japan 22 720 499 483 430 384 170 2.1k
Loek van Heerebeek Netherlands 17 334 0.5× 568 1.1× 2.9k 5.9× 231 0.5× 471 1.2× 33 3.4k
Egbert G. Mik Netherlands 30 500 0.7× 346 0.7× 222 0.5× 400 0.9× 77 0.2× 83 2.6k
Frank Wiesmann Germany 34 536 0.7× 1.1k 2.2× 2.8k 5.7× 356 0.8× 150 0.4× 65 4.3k
Sadao Takahashi Japan 25 639 0.9× 780 1.6× 524 1.1× 135 0.3× 424 1.1× 60 1.9k
Jin Won Kim South Korea 27 886 1.2× 275 0.6× 1.0k 2.1× 468 1.1× 66 0.2× 167 2.4k
Axel Niendorf Germany 23 951 1.3× 539 1.1× 180 0.4× 484 1.1× 204 0.5× 77 2.3k
Jörg Stypmann Germany 36 662 0.9× 781 1.6× 1.3k 2.8× 586 1.4× 54 0.1× 104 3.4k
Toshitaka Yajima Japan 25 221 0.3× 756 1.5× 1.0k 2.1× 209 0.5× 388 1.0× 65 2.0k
V. A. Sorokin Singapore 16 190 0.3× 429 0.9× 243 0.5× 224 0.5× 36 0.1× 73 1.1k
Hideki Doi Japan 22 579 0.8× 693 1.4× 557 1.2× 88 0.2× 488 1.3× 48 2.0k

Countries citing papers authored by N. Iwai

Since Specialization
Citations

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

Fields of papers citing papers by N. Iwai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of N. Iwai

This figure shows the co-authorship network connecting the top 25 collaborators of N. Iwai. A scholar is included among the top collaborators of N. Iwai 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 N. Iwai. N. Iwai 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.
Yoshida, Takehito, Osamu Dohi, Takeshi Yasuda, et al.. (2025). Diagnostic Ability of Magnifying Endoscopy Compared to Biopsy Examination for Early Gastric Cancer prior to Endoscopic Submucosal Dissection. Digestive Diseases. 43(3). 358–367.
2.
Sakai, Hiroaki, N. Iwai, Osamu Dohi, et al.. (2024). Effect of texture and color enhancement imaging on the visibility of gastric tumors. Scientific Reports. 14(1). 19125–19125. 2 indexed citations
3.
4.
Iwai, N., Takashi Okuda, Kohei Oka, et al.. (2024). Prognostic value of moderate or massive ascites in patients with advanced gastric cancer. Oncology Letters. 27(3). 116–116. 1 indexed citations
5.
Yamaguchi, Kanji, Yusuke Takahashi, Hiroshi Ishiba, et al.. (2024). Hepatocyte-specific GDF15 overexpression improves high-fat diet-induced obesity and hepatic steatosis in mice via hepatic FGF21 induction. Scientific Reports. 14(1). 23993–23993. 7 indexed citations
6.
Iwai, N., Hiroaki Sakai, Kohei Oka, et al.. (2023). Predictors of response to anamorelin in gastrointestinal cancer patients with cachexia: a retrospective study. Supportive Care in Cancer. 31(2). 115–115. 13 indexed citations
7.
Inoue, Ken, Kan Zen, Reo Kobayashi, et al.. (2023). Gastrointestinal Angiodysplasia in Patients with Severe Aortic Stenosis: The Endoscopic Features of Heyde’s Syndrome. Digestion. 104(6). 468–479. 2 indexed citations
8.
9.
Sakai, Hiroaki, N. Iwai, Junichi Sakagami, et al.. (2022). Rectal administration of low-dose diclofenac does not reduce post-endoscopic retrograde cholangiopancreatography pancreatitis: a propensity score matching analysis. Surgical Endoscopy. 37(4). 2698–2705. 5 indexed citations
10.
Iwai, N., Takashi Okuda, Taishi Harada, et al.. (2020). Gastric Metastasis from Colorectal Cancer Mimicking a Submucosal Tumor. Case Reports in Gastroenterology. 14(2). 338–345. 4 indexed citations
11.
Iwai, N., Osamu Dohi, Yuji Naito, et al.. (2020). High-Risk Comorbidity Influences Prognosis in Early Gastric Cancer after Noncurative Endoscopic Submucosal Dissection: A Retrospective Study. Digestive Diseases. 39(2). 96–105. 8 indexed citations
12.
13.
Dohi, Osamu, Nobuaki Yagi, Yuji Naito, et al.. (2018). Blue laser imaging-bright improves the real-time detection rate of early gastric cancer: a randomized controlled study. Gastrointestinal Endoscopy. 89(1). 47–57. 75 indexed citations
14.
Gen, Yasuyuki, Kohichiroh Yasui, Tomoko Kitaichi, et al.. (2017). ASPP2 suppresses invasion and TGF-β1-induced epithelial–mesenchymal transition by inhibiting Smad7 degradation mediated by E3 ubiquitin ligase ITCH in gastric cancer. Cancer Letters. 398. 52–61. 27 indexed citations
15.
Dohi, Osamu, N. Iwai, Tomohiro Ueda, et al.. (2016). Mo1328 What Is the Best Choice of Image-Enhanced Laser Endoscopy for Early Gastric Cancer?: A Gastroscopy Video Evaluation Study. Gastrointestinal Endoscopy. 83(5). AB458–AB458.
16.
Iwai, N., et al.. (2007). Effects of Herbal Medicine Dai-Kenchu-To on Anorectal Function in Children with Severe Constipation. European Journal of Pediatric Surgery. 17(2). 115–118. 33 indexed citations
17.
Fumino, Shigehisa, N. Iwai, Eiichi Deguchi, et al.. (2007). Bleeding Tendency as a First Symptom in Children with Congenital Biliary Dilatation. European Journal of Pediatric Surgery. 17(1). 2–5. 6 indexed citations
18.
Fumino, Shigehisa, et al.. (2005). A Clinical Analysis of Prognostic Parameters of Survival in Children with Congenital Diaphragmatic Hernia. European Journal of Pediatric Surgery. 15(6). 399–403. 22 indexed citations
19.
Iwai, N., K. Tokiwa, & Takuji Yamagami. (1997). Myoepithelial hamartoma of the ileum causing intussusception in an infant. Pediatric Surgery International. 12(2-3). 206–207. 3 indexed citations
20.
Kasukawa, A., et al.. (1993). High temperature operation 1,3 \µm GaInAsP/InP GRIN-SCH strained-layer quantum well lasers. Conference on Lasers and Electro-Optics. 2 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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