This study was conducted to investigate the effects of partial replacement of fish meal (FM) in the diets with defatted soybean meal (SBM) or soybean protein concentrate (SPC) on growth and product quality of Japanese eel during fattening period. Eels with mean body weight of 80.05 g were raised in indoor concrete tanks for 3 months. The daily feed intake, growth and feed conversion ratio were insignificantly affected by dietary treatments. The results of Chroma meter analysis showed that the skin lightness above lateral line was significantly higher and redness was lower in the eel fed with the SCP diet than those of fish fed the control (FM) diet. In addition, the meat color of the eel fed the SCP diet was more brighter and bluish green as comparison with the control fish. The lower slaughter rate and higher roasted shrinkage rate in the control fish were found when compared to the SBM group and SCP group respectively. The results of sensory evaluation on roasted eel revealed no significant differences between fish fed the control and the experimental diets.