Study on Japanese corporate ratings by Rating agencies with Artificial Neural Network and Self-organizing Maps

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We tried to verify that artificial neural network will be stronger tool to simulate only using quantitative variables the corporate ratings that was determined by the corporate agencies using quantitative and qualitative variables in Japan. We are able to make clear the factors that make strong results to the corporate ratings. In order to raise the accuracy, We expected and tried to use the Cluster analysis and self organizing map. But we were not able to get better results.