In a series of studies on the production of activated carbon from the waste material (bagasse) remaining after pressing of sugarcane. We obtained produce activated carbon with a specific surface area of 1,096 x 10(3) m(2)/kg by treating the bagasse under the following conditions: activation temperature, 1,073 K, rate of temperature-increase, 5 K/min, retention time, 1.0 hour; and the amount of water, 6 kg/kg-bagasse. Next, an attempt to increase the hardness of the activated carbon yielded material with a hardness level of about 1/3 that of commercially available coconut-shell activated carbon. The adsorption equilibrium of the hardened activated carbon, for 13 different organic compounds in single -solute aqueous solutions at 298 K was then measured in a concentration range of 0.01 to 500 mol/m(3). The amount of solute adsirbed by this activated carbon at each concentration was found to be the same as or higher than that of the ordinary CAL activated carbon. With respect to the obtained adsorption equilibrium, the Langmuir equation was solved and the result was found to fit to the equation.