PROBLEM TO BE SOLVED: To provide a rice ball suppressed in moisture movement to boiled rice, in spite of using as the ingredient, a grated yam processed product containing a large quantity of water, and making the original texture of grated yam remain, and to provide a rice ball grated yam processed product to be used for the rice ball. SOLUTION: This rice ball is obtained by using as the ingredient, a grated yam processed product containing grated yam and a thickener, and having a water content of 65-90%, and a viscosity of 3-40 Pa s (20°C). COPYRIGHT: (C)2013,JPO&INPIT