Japanese version of Big-Bang is not independent of the previous reformations on the financial system in Japan since 1980's, which has firstly attempted for the purpose of increasing the convenience of the customers of financial institutions and of the users of financial markets. Big-Bang in Japan, however, has been treated as if it had other more political or macro-economic aims such as demand stimulating effect or breaking the financial hollowing of Tokyo market, and the improvement of the convenience has practically been ranked as a secondary object. This paper contemplates Japanese version of Big-Bang from the view-point of personal users and customers, who themselves are per se central figures of financial deregulation, and we'll consider the merits and
demerits of our Big-Bang for them (or ourselves). In our consideration, we separate the wealthy persons, who have the ability to invest a financial commodity of more than ten millions yen without hesitation, from other ordinary persons, who have no ability to do so. And this paper indicates that, as the result of Big-Bang in Japan, the wealthy people would be able to get the great profits in addition to the profits belonging to ordinary people. But this paper also indicates another fact that wealthy class might suffer from greater losses such as market risks than those of ordinary class. The immediate subject of the proper authorities should be the
legislation connected with the users' protections. We think that the postponement ofsuch legislation in Japan must be the clear evidence that the convenience of personal users has been treated as a secondary end.