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Y. Kojima · SciRah

Researcher profile · Semantic Scholar

Y. Kojima

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Y. Kojima — researcher profile on SciRah

h-index: 13
Works: 62
Citations: 685

Most-cited papers

Accuracy of screening for gastric cancer using serum pepsinogen concentrations
F. Kitahara, K. Kobayashi, T. Sato, Y. Kojima +2 more
1999Gut247 citations Open access
Semantic Scholar
Impaired intracellular signal transduction in gastric smooth muscle of diabetic BB/W rats.
Toku Takahashi, Y. Kojima, Yasuhiro Tsunoda, L. Beyer +3 more
1996American Journal of Physiology50 citations
Semantic Scholar
The efficacy and safety of lenvatinib for advanced hepatocellular carcinoma in a real-world setting
S. Obi, Takahisa Sato, Shin'pei Sato, M. Kanda +14 more
2019Hepatology International37 citations Open access
Semantic Scholar
Development of a molecular barcode detection system for pancreaticobiliary malignancies and comparison with next-generation sequencing.
H. Ohyama, Yosuke Hirotsu, Kenji Amemiya, Rintaro Mikata +8 more
2023Cancer Genetics32 citations
Semantic Scholar
Comparison between two amplicon-based sequencing panels of different scales in the detection of somatic mutations associated with gastric cancer
Yosuke Hirotsu, Y. Kojima, K. Okimoto, Kenji Amemiya +2 more
2016BMC Genomics29 citations Open access
Semantic Scholar
Severe atrophic gastritis with Helicobacter pylori infection and gastric cancer
F. Kitahara, R. Shimazaki, Tadashi Sato, Y. Kojima +2 more
1998Gastric Cancer27 citations Open access
Semantic Scholar
Molecular subtype switching in early-stage gastric cancers with multiple occurrences
S. Takaoka, Yosuke Hirotsu, H. Ohyama, H. Mochizuki +9 more
2019Journal of gastroenterology24 citations
Semantic Scholar
Deficiency of mismatch repair genes is less frequently observed in signet ring cell compared with non-signet ring cell gastric cancer
Yosuke Hirotsu, H. Mochizuki, Kenji Amemiya, H. Ohyama +12 more
2019Medical Oncology21 citations
Semantic Scholar
Influence of NUDT15 variants on hematological pictures of patients with inflammatory bowel disease treated with thiopurines
Y. Kojima, Yosuke Hirotsu, W. Omata, Makoto Sugimori +8 more
2018World Journal of Gastroenterology19 citations Open access
Semantic Scholar
Nonspecific esophageal motor disorder associated with thickened muscularis propria of the esophagus.
Y. Kojima, M. Ikeda, Toshiya Nakamura, M. Fujino
1992Gastroenterology17 citations Open access
Semantic Scholar
Multiple hepatic peribiliary cysts discovered incidentally at a medical examination
Shun-ichi Okada, Y. Kojima, A. Morozumi, T. Ainota +2 more
2001Journal of Gastroenterology and Hepatology15 citations
Semantic Scholar
Factors contributing to the overall survival in patients with hepatocellular carcinoma treated by sorafenib.
Yuya Tsukui, H. Mochizuki, Y. Hoshino, S. Kawakami +21 more
2012Hepato-Gastroenterology13 citations
Semantic Scholar
Evaluation of Immunological Rapid Urease Testing for Detection of Helicobacter pylori
T. Sato, M. Fujino, Y. Kojima, F. Kitahara +4 more
2000European Journal of Clinical Microbiology and Infectious Diseases13 citations
Semantic Scholar
Endoscopic urease sensor system for detecting Helicobacter pylori on gastric mucosa.
Tadashi Sato, M. Fujino, Y. Kojima, H. Ohtsuka +6 more
1999Gastrointestinal Endoscopy13 citations
Semantic Scholar
Hepatic immune-related adverse event increased the overall survival of patients with malignancies treated with immune checkpoint inhibitors
Kaori Matsumoto, Tatsuo Kanda, Junichiro Wakatsuki, Young-Jin Kim +17 more
2025Hepatology International12 citations Open access
Semantic Scholar
Gastric carcinoma, an endoscopically curable disease.
M. Fujino, A. Morozumi, Y. Kojima, T. Nakamura +4 more
1994Bildgebung = Imaging11 citations
Semantic Scholar
Development of an Integrated Filing System for Endoscopic Images
M. Fujino, M. Ikeda, Yasuyuki Yamamoto, Tadashi Kinose +11 more
1991Endoscopy11 citations
Semantic Scholar
Validation of Tokyo Guideline 2013 as Treatment of Acute Cholecystitis by Real World Data
S. Harai, H. Mochizuki, Y. Kojima, K. Nakagomi +5 more
2019Digestive Diseases9 citations
Semantic Scholar
Comparison of genomic profiling of circulating tumor DNA in pancreaticobiliary malignancies in plasma and bile
H. Ohyama, Yosuke Hirotsu, Kenji Amemiya, Yoshifumi Miura +8 more
2023Cancer8 citations Open access
Semantic Scholar
Detection of actionable mutations in archived cytological bile specimens
H. Ohyama, Yosuke Hirotsu, Kenji Amemiya, T. Oyama +6 more
2021Journal of hepato-biliary-pancreatic sciences8 citations
Semantic Scholar
Adenosine 3',5'-cyclic monophosphate-stimulated Ca++ efflux and acetylcholine release in ileal myenteric plexus are mediated by N-type Ca++ channels: inhibition by the kappa opioid receptor agonist.
Y. Kojima, Y. Tsunoda, C. Owyang
1997Journal of Pharmacology and Experimental Therapeutics8 citations
Semantic Scholar
Genomic profiling amplifies the utility of endoscopic ultrasound-guided fine needle biopsy by identifying clinically applicable druggable mutations in pancreatic cancer.
H. Ohyama, Rintaro Mikata, Yosuke Hirotsu, Kenji Amemiya +10 more
2022Annals of Diagnostic Pathology7 citations
Semantic Scholar
Rapidly declining trend of signet ring cell cancer of the stomach may parallel the infection rate of Helicobacter pylori
H. Ohyama, Dai Yoshimura, Yosuke Hirotsu, Kenji Amemiya +12 more
2019BMC Gastroenterology7 citations Open access
Semantic Scholar
Immunological Rapid Urease Test for Detecting Helicobacter pylori: Comparative Study of Biopsy Specimens and Gastric Mucus
Tadashi Sato, M. Fujino, Y. Kojima, F. Kitahara +6 more
19996 citations
Semantic Scholar
Detection of actionable mutations in cytological specimens obtained by endoscopic ultrasound-guided fine needle aspiration with rapid onsite evaluation in pancreatic cancer.
H. Ohyama, Yosuke Hirotsu, Kenji Amemiya, H. Amano +9 more
2022Annals of Diagnostic Pathology4 citations
Semantic Scholar
Endoscopic Transcortical Selective Amygdalohippocampectomy for Mesial Temporal Lobe Epilepsy: 2-Dimensional Operative Video.
Takehiro Uda, Toshiyuki Kawashima, M. Hattori, Y. Kojima +2 more
2021Operative Neurosurgery4 citations
Semantic Scholar
[Gastrointestinal pacemaker system].
Ichiro Takayama, Y. Daigo, Y. Kojima, M. Fujino
2001Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology4 citations
Semantic Scholar
Endosonographic criteria for assessment of the depth of duodenal invasion in carcinoma of the papilla of Vater
A. Morozumi, M. Fujino, Tadashi Sato, Y. Kojima +4 more
20014 citations
Semantic Scholar
Electronic endoscopy in perspective.
M. Fujino, A. Morozumi, Tsuneya Nakamura, Y. Kojima +6 more
1994Journal of gastroenterology4 citations
Semantic Scholar
[Peptic ulcer in patients with diabetes mellitus].
Tadashi Sato, F. Kitahara, Toshiya Nakamura, Y. Kojima +1 more
2002Nihon rinsho. Japanese journal of clinical medicine3 citations
Semantic Scholar
4708 Immunological rapid urease test-a new diagnostic system for detecting helicobacter pylori-.
Tadashi Sato, M. Fujino, Y. Kojima, F. Kitahara +5 more
20003 citations
Semantic Scholar
[An investigation of the factors influencing serum pepsinogen levels--sex, age, smoking, drinking].
F. Kitahara, A. Kashiwagi, T. Kanai, T. Idesawa +11 more
1996Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology3 citations
Semantic Scholar
Esophageal Stenosis and Thickening of the Muscularis Propria Diagnosed by Endoscopic Ultrasonography (EUS Diagnosis of Esophageal Muscle Thickening)
M. Ikeda, M. Fujino, Y. Kojima, Toshiya Nakamura +1 more
19913 citations
Semantic Scholar
Case report and review of the literature of primary central nervous system lymphoma of the fourth ventricle
Y. Kojima, Kosuke Nakajo, Tsutomu Ichinose, Yoichiro Morikawa +2 more
2022Surgical neurology international2 citations Open access
Semantic Scholar
Liquid biopsy of wash samples obtained via endoscopic ultrasound‐guided fine‐needle biopsy: Comparison with liquid biopsy of plasma in pancreatic cancer
H. Ohyama, Yosuke Hirotsu, Kenji Amemiya, Hiroyuki Amano +8 more
2024Diagnostic Cytopathology1 citations
Semantic Scholar
The Use of Electronic Medical Records-Based Big-Data Informatics to Describe ALT Elevations Higher than 1000 IU/L in Patients with or without Hepatitis B Virus Infection
H. Amano, T. Kanda, H. Mochizuki, Y. Kojima +11 more
2021Viruses1 citations Open access
Semantic Scholar
Factors Predicting Subsequent Hospitalization in Patients with Ulcerative Colitis: Total Colonoscopic Findings are the Strongest Predictor.
T. Kuno, Y. Kojima, H. Mochizuki, Yoshimitsu Fukasawa +11 more
2015Hepato-Gastroenterology1 citations
Semantic Scholar
Life Style Factors Influencing Serum Pepsinogen Levels in Healthy Japanese: A Prospective Study
Murdani Abdullah, F. Kitahara, Tadashi Sato, Y. Kojima +2 more
20031 citations
Semantic Scholar
Change of afferent/efferent innervation in the gastrointestinal tract of wild type and Ws/Ws rats
H. Ohtsuka, E. Seto, K. Hosoda, Abudulla Muludani +2 more
20011 citations
Semantic Scholar
Enhanced muscle contraction and relaxation of gastric body in Ws/Ws rat
E. Seto, Y. Kojima, K. Hosoda, H. Ohtsuka +1 more
19981 citations Open access
Semantic Scholar
Diffuse muscular thickening of esophagus associated with multiple leiomyomas diagnosed by endoscopic ultrasonography
M. Ikeda, M. Ochiai, Toshiya Nakamura, Y. Kojima +3 more
1995Digestive Diseases and Sciences1 citations
Semantic Scholar
A real-world study on the prognosis of patients with pancreatic cancer: A prospective stationary survey from 2007-2020.
A. Abe, H. Ohyama, Yoshiki Asahina, Kowa Nagasaka +15 more
2026Internal medicine0 citations Open access
Semantic Scholar
Influence of NUDT15 Genotyping on Dose Intensity of Thiopurine Administration and Long-Term Clinical Outcomes (Hospitalization and Surgery)
Shotaro Tsunoda, Y. Kojima, Yosuke Hirotsu, Hiroyuki Amano +8 more
2024Archives of Clinical and Biomedical Research0 citations Open access
Semantic Scholar
Mo1229: GENOMIC PROFILE OF ENDOSCOPIC ULTRASOUND-GUIDED FINE NEEDLE BIOPSY IDENTIFIES CLINICALLY APPLICABLE DRUGGABLE MUTATIONS IN PANCREATIC CANCER
H. Ohyama, Yosuke Hirotsu, Kenji Amemiya, Yoshifumi Miura +5 more
2022Gastroenterology0 citations
Semantic Scholar
Mo1128 INFLUENCE OF NUDT15 AND TPMT ON LONG-TERM CLINICAL COURSE OF PATIENTS WITH INFLAMMATORY BOWEL DESEASE TREATED WITH THIOPURINES
Y. Kojima, Yosuke Hirotsu, Shotaro Tsunoda, H. Amano +8 more
20200 citations
Semantic Scholar
Analysis of metastatic foci using in house Gastric 58 SMG panel of 351,050 nt and d/pMMR status by IHC of MMR proteins
M. Hada, Yosuke Hirotsu, Kenji Amemiya, Yuki Nagakubo +7 more
2019Annals of Oncology0 citations Open access
Semantic Scholar
Tu1716 - Infulenece of Nudt15 Variants on Hematologcal Pictures of Patients with Inflammatory Bowel Diseases Treated with Thiopurines
Y. Kojima, Yosuke Hirotsu, W. Omata, Makoto Sugimori +8 more
20180 citations
Semantic Scholar
Analysis of Potential Somatic Mutations of H.Pylori-Infected Mucosa in the Development of Gastric Cancer
Y. Kojima, Yosuke Hirotsu, Kenji Amemiya, H. Mochizuki +1 more
20170 citations
Semantic Scholar
Comparison between two amplicon-based sequencing panels of different scales in the detection of somatic mutations associated with gastric cancer
Yosuke Hirotsu, Y. Kojima, K. Okimoto, Kenji Amemiya +2 more
2016BMC Genomics0 citations Open access
Semantic Scholar
Sa1650 Factors Which Affect Procedure-Related Perforation in Colonic Endoscopic Submucosal Dissection
Y. Kojima, S. Harai, Natsuhiko Kuratomi, Yoshimitsu Fukasawa +5 more
20150 citations
Semantic Scholar

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H. Mochizuki×26
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H. Mochizuki — researcher profile on SciRah
Yosuke Hirotsu×20
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Yosuke Hirotsu — researcher profile on SciRah
K. Hosoda×16
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K. Hosoda — researcher profile on SciRah
M. Omata×16
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M. Fujino — researcher profile on SciRah

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Yoji Suzuki×12

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Yoji Suzuki — researcher profile on SciRah

A. Morozumi×12

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A. Morozumi — researcher profile on SciRah

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F. Kitahara — researcher profile on SciRah

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Masao Omata — researcher profile on SciRah