Phase II feasibility study of adjuvant S-1 plus docetaxel for stage III gastric cancer patients after curative D2 gastrectomy（OGSG0403）

A Randomized Controlled Phase III Trial to Evaluate the Effect of Preoperative Enteral Immunonutrition on the Surgical Site Infection after Total Gastrectomy (OGSG0507)

A Randomized Controlled Trial of Antimicrobial Prophylaxis Infusion after Gastric Cancer Surgery（OGSG0501）

Randomized phase II trial of S-1 plus irinotecan versus S-1 plus paclitaxelas first-line treatment for advanced gastric cancer (OGSG0402)

A phase II study of systemic chemotherapy with TS-1 combined with cisplatin followed by surgery in advanced gastric cancer (OGSG0004)

A randomized controlled trial to evaluate the effect of preoperative enteral immunonutrition on the surgical site infection after total gastrectomy（OGSG0507）

Randomized phase II trial of S-1 plus irinotecan versus S-1 plus paclitaxel as first-line treatment for advanced gastric cancer（OGSG0402）

進行,再発胃癌の3次治療でのPaclitaxel weekly投与の安全性試験（OGSG0602）最終報告

胃がんに対する幽門側胃切除の予防抗菌薬投与の必要性に関する第III相試験（OGSG0501）

高度進行胃癌に対する 術前TS-1/CDDP療法＋外科切除 第2相臨床試験（OGSG0004）