A blow molding system (10) comprises: an injection molding unit (11) that produces a preform (51) by injection molding; a temperature adjustment unit (12) that adjusts the temperature of the preform (51) produced by the injection molding unit (11); a blow molding unit (16) that produces a container (52) by blow-molding the preform (51) the temperature of which has been adjusted by the temperature adjustment unit (12); and a first sterilization unit (17) that sterilizes the container (52) produced by the blow molding unit (16). The surface temperature of at least part of the container (52) and the preform (51) is maintained at not lower than 40 degrees centigrade from the injection molding unit (11) to the first sterilization unit (17).

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