I, II Following up 200 delinquents for more than a year, several factors which had been measured before were found to predict prognoses as shown in the previous reports. All of those factors are shown again on the left side of Table 1. Of course, they were regarded as indicating personality traits. However, because they were related to one another, the relations were studied more closely. Thus 11 factors were finally obtained as predicting prognoses which are shown on the right side of Table 1. These factors, by themselves, can predict prognoses. Among them, the first seven factors are the ones which can be measured through objective examination. and from these factors, a predction table (Table 5) was obtained by the method as shown in Table 4. Table 5 is similar to one of the various prediction tables reported by Glueck and many others. The next two are the diagnostic factors obtained by understanding the behavior traits, and from these factors another prediction table (Table 3) was obtained. The last two, on the other hand, are not the representative factors, because other main psychological tests (TAT, Rorschach, etc) have not been made, and we do not consider these factors significant enough. III If we consider the delinquent condition as a disease, it is necessary to study not only the relations between symptoms or personality background and prognosis, but also the relations between the disease itself and prognosis. Then, what is the disease itself? Many typological diagnoses have been studied with regard to crime or delinquency. However, from the therapeutic point of view, it is suitable to classify them, as Healy reported, according to the dynamic situation or socio-psychological mechanism, in which personality and environment are concerned, and from which delinquencies result. Accordingly, the sociopsychological diagnostic classification of delinquent conditions has been made as follows: Those which belong to Group I are the crises caused by personality defects such as exogenious or endogenious psychosis, serious cases of feeblemindedness and psychopath. These defects are regarded as producing delinquencies under no environmental abnormalities. Group II refers to all types which are not contained in I, III, IV and V For instance, the neurotic crisis caused by unconscious conflict belongs to this group. Furthermore, the acute crisis which results in the pureoccasional