Phase II Study of a Combination of S-1 and Paclitaxel in Patients with Unresectable or Metastatic Gastric Cancer（OGSG0105）

Multi-Center Phase II Study for Combination Therapy with Paclitaxel/Doxifluridine to Treat Advanced/Recurrent Gastric Cancer Showing Resistance to S-1 (OGSG0302)

Phase II study of a combination of iIrinotecan and S-1 in patients with advanced gastric cancer (OGSG0002)

Multi-Center Phase II Study for Combination Therapy with Paclitaxel/Doxifluridine to Treat Advanced/Recurrent Gastric Cancer Showing Resistance to S-1 (OGSG0302)

Multi-center, phase II study for combination therapy with paclitaxel/doxifluridine to treat advanced/recurrent gastric cancer showing resistence to S-1: Final results (OGSG0302)

TS-1単独、TS-1/CDDP併用療法に抵抗性の進行再発胃癌に対する二次治療の無作為化第II相試験（OGSG0701）

進行・再発大腸癌に対するCPT-11+S-1併用化学療法の第Ⅱ相試験（OGSG0405）

TS-1抵抗性の進行・再発胃癌に対するPaclitaxel/Doxifluridine療法の第II相臨床試験（OGSG0302）

Multicenter phase II study of irinotecan plus bolus fluoroutacil/l-leucovorin for metastasic colorectal cancer（OGSG0201）

Multicenter phase II study of 2 weeks administration with TS-1 followed by 1 week rest against metastatic gastric cancer