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About

Toshiyasu Ojima is a surgical oncologist whose research centers on minimally invasive approaches to gastric cancer treatment, with a particular focus on robotic and laparoscopic gastrectomy techniques. His most impactful contribution is a landmark randomized clinical trial comparing robotic gastrectomy (RG) with laparoscopic gastrectomy (LG) in gastric cancer patients, which has already garnered 27 citations since its 2023 publication — a testament to the field's urgent need for high-quality prospective evidence in this area. This work investigates whether robotic approaches meaningfully reduce intra-abdominal infectious complications, a critical question for surgical decision-making. Ojima has further advanced the field through detailed retrospective analysis identifying risk factors for postoperative complications following robotic gastrectomy, helping surgeons better anticipate and manage adverse outcomes. His involvement in JCOG1809, a national phase II trial evaluating laparoscopic and robotic total gastrectomy with spleen-preserving splenic hilar dissection for locally advanced proximal gastric cancer, demonstrates his commitment to challenging established surgical paradigms and improving patient quality of life by potentially reducing the morbidity associated with routine splenectomy. His body of work is shaping the future of minimally invasive gastric cancer surgery.