| Characteristic | n = 10 | |
| Age (yr) | Median (range) | 66.5 (56 - 76) |
| Gender | Male/Female | 8/2 |
| ECOG PS | 0/1 | 8/2 |
| Surgery | Unresectable/Recurrence | 7/3 |
| HER2 status | Positive/Negative/Unknown | 2/6/2 |
| Metastatic site | 0/1 | 7/3 |
| Peritoneal dissemination | Present | 4 |
| Pre-chemotherapy | Adjuvant S-1 | 2 |