Fishermen from the cooperative again forced their way into the factory on 12 August to continue negotiations. No agreement could be reached but the two sides did manage to agree to a joint inspection of fishing conditions in Minamata Bay, followed by further talks on 17 August. After this inspection Chisso admitted that fishing was impossible in some areas and made a final offer of JPY13 million (USD36,100). This paltry sum incensed the fishermen. Violence broke out, riot police were called and Nishida and other company employees were effectively held hostage in the factory building. Only after Mayor Todomu Nakamura agreed to mediate between the two sides did the fishermen leave the factory grounds. The mediation committee formed by Mayor Nakamura was stacked heavily in Chisso's favour and presented a decision on 26 August. The company would pay JPY20 million (USD55,600) directly to the cooperative and set up a JPY15 million (USD41,700) fund to promote the recovery of fishing. The proposal was qualified with the ultimatum that if either side rejected, the committee would stop mediation completely. On 29 August the fishing cooperative delivered its response: "In order to end the anxiety of the citizens, we swallow our tears and accept". The company also agreed and the first compensation agreement between Chisso and fisherman was complete.