Japanese companies have to compete with world companies in giving satisfactions and delights to customers and employees in order to improve achievements. Till now, general Japanese were voluntary, forward and diligent, so could give big results by problem solving activities that attached great importance to the sum and cooperation.But、problem solving dependent on such as bottom up power of employees in Japanese companies　are relatively losing power in global competition. So, the management tops of Japanese companies have to be able to set "Management targets"that aimed for competition and winning world companies.

However, even if they introduced "six sigma" into reality to realize "Management targets", they are still apt to depend on bottom up power.
Compared with Jack Welch of GE and Carlos Ghosn of Nissan, they are not earnest in setting "Management targets" by own judgment and in telling the aim to employees, concentrating their powers　and　motivating them too much for the projects. This is one factor that makes six sigma of a Japanese company a half-finished thing.