Preservation of seaweed beds is seen as an important issue. However, the seaweed withering phenomenon is also a major problem that deserves attention. As the reduction of the seaweed beds continues it has been found that grazing by sea urchins and herbivorous fishes are the principal causes..To remove sea urchins directly by fishermen and divers is effective but is a burden for fishermen. Thus, from an environmental protection perspective, there is a need for public assistance. In order to decrease the population of herbivorous fishes, their consumption should be actively promoted.After such countermeasures are taken, monitoring must definitely be conducted and the quality of the countermeasures evaluated. Flexible management should be adopted, allowing other approaches if the results of the evaluation prove the countermeasures inadequate.