This study aimed develop a method of effective use of shochu distillation remnants. We examined inhibitory effects of shochu distillation remnants on the growth of various tumor cells in vitro and toxicity to normal rats in vivo. High inhibitory effects of shochu distillation remnants on the growth of stomach tumor cells were obtained. Furthermore, shochu distillation remnants showed no toxicity to normal rats in vivo. The presence of sugar components in the shochu distillation remnants was suggested by IR spectra and HPLC analysis. These results suggest that shochu distillation remnants might be effectively used not only as medicine but also as food supplements.