Abstract: A brewing tank which has a regenerative heater inserted into the tank out of the tank through the wall of the tank having heat insulation, and a brewing regenerative heater which has a regenerator having a regenerative bobbin, a heater wound on the outer periphery of the regenerative bobbin and a regenerative conduit coated on the outer periphery of the regenerative bobbin wherein the regenerator is provided in an outer cylinder. Thus, the brewing tank and the brewing regenerative heater can suitably and efficiently manage the temperature of unrefined soy in a tank.