We investigated the biochemical characteristics of several types of vegetable and fruit powders and the gel strength of Kamaboko mixed with those powders to improve surimi gel quality. Burdock, onion, and carrot powders had high concentrations of fructan and total sugar. Three powders (purple sweet potato, Chinese yam, and East Indian lotus root) contained high amounts of starch. Pectin and polyphenol contents were high in Yuzu powder. Gel strength decreased after mixing with any of the powders. Although polyphenol contents seemed to decrease in the gel strength slightly, it was difficult to estimate gel strength by adding a particular powder and amount.