At least at least one embodiment of the present invention relates to a method for using a high pressure-resistant enzyme in a high pressure condition a method for promoting the activity of the high pressure-resistant enzyme by means of a high pressure treatment a composition, which contains the high pressure-resistant enzyme, for decomposing proteins under a high pressure condition a composition, which contains the composition for decomposing proteins, for preparing natural flavoring substances a container for high pressure treatment, which contains the composition for decomposing proteins and a method for measuring the activity of the high pressure-resistant enzyme, which comprises a step of decomposing an azocasein solution serving as a substrate by using the high pressure-resistant enzyme treated under a high pressure condition.
