Access to territorial boundaries is limited to members of co-operatives. The co-operatives establish regulations concerning boats, gear, season, area, mesh size, marketing of fish etc. Thorough studies are needed to determine the answer. Very careful adaptation to local conditions would be necessary if Japan is indeed taken up as a model. Fisheries research institutes in Japan play a very constructive role in fisheries management by alerting fishermen about the state of resources.
Fishermen then take up management measures themselves.
In the past, fisheries management was taken up only during a crisis. Nowadays, fishermen are more careful, thanks to support from research institutes. If you introduce more fishing boats, the total output will remain the same, while individual catches will decrease. Therefore the optimum number of fishing vessels is determined, and surplus vessels are transferred to other areas to improve cost-effectiveness. Two days of fishing followed by a non-fishing day is an example.