Provided is a method for more widely spreading the use of an existing technique for suppressing methane emission. A method for increasing suppression of methane from a paddy field, the method including the following steps: an emission amount calculation step for calculating, from a basic cultivation parameter for rice in a paddy field, the emission amount (A) of methane normally generated when rice is cultivated in the paddy field a suppressed emission amount calculation step for calculating the rate of suppression of methane emission (B1) or the suppressed emission amount (B2) from a methane-suppressed cultivation parameter that is used when rice is cultivated in the paddy field and that relates to emission of methane including water-level management and the amount of material used for suppressing the generation of methane a discount rate calculation step for calculating a discount rate (C) (0 ≤ C ≤ 1) for the suppression of methane emission for calibrating the methane-suppressed cultivation parameter after rice has been cultivated in the paddy field, by using discount rate information including information about the use of material used for suppressing the generation of methane during the period in which the rice has been cultivated, a reduction calculation step for calculating the reduction in methane emission from the paddy field using the formula A × B1 × C or the formula (A - B2) × C in which the rate of suppression (B1) or the suppressed emission amount (B2) is used and a carbon-credit-awarding step for acquiring carbon credits as compensation for the reduction amount, and awarding the carbon credits to a creditor.La présente invention concerne un procédé pour diffuser plus largement lusage dune technique existante destinée à supprimer lémission de méthane. La présente invention concerne un procédé destiné à augmenter la suppression de méthane dune rizière. Ledit procédé comprenant les étapes suivantes : une étape de calcul de quantité démission qui calcule,
