Analysis of Recent Japanese Chemical Industries Observed by the Dynamical Rate of Return on Investment

The authors investigated and analysed the profitabihties of the recent Japanese chemical industrial companies by the use of so-called ”soundness D” presented and recommended previously.　The results obtained are summarized as follows :　1. The situation in the profitabilities in companies is as summarized in the conclusion in section 4.　2. In the dynamical consideration of profitability, ”soundness D” seemed to be more useful than the ratio of profit on investment