KEKB is an asymmetric energy B factory with the highest
>> luminosity in the world. The Belle group at KEKB has played
>> an important role in establishing the Standard Model by
>> precise test of Kobayashi-Maskawa model of quark mixing
>> and CP violation in the various aspects together with BaBar.
>> If new physics exists at the TeV energy scale, it is quite
>> conceivable that deviations from the predictions of the
>> Standard Model will be observed in the decays of heavy
>> flavors such as B, D and tau. By increasing the luminosity
>> of KEKB by a factor of ~50, the flavor physics will enter a
>> new era of precision measurements in which the possibility
>> of detecting new physics effects will be greatly improved.
>> Therefore, detailed measurements at the upgraded KEKB
>> facility can provide an excellent opportunity to examine the
>> fundamental properties of CP violation and flavor mixing
>> in new physics. In this talk, physics program and design of
>> the machine and the detector will be reviewed. Especially,
>> our strategy to reach the luminosity close to 1036 will be
>> presented in detail.