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   So far RIKEN group has promoted the observations of the high z radio
   loud/quiet QSO (RLQ/RQQ). Thus we have found that the RLQs showed an
   evolution effect of intrinsic absorption gas, while RQQs have not shown
   the evolution effect. The spectral index of RLQs does not depends on
   the redshift, and only two targets have been detected for z > 4 by
   ASCA. Both do not show the excess absorption which is common to the
   high z RLQs and have some property of BL Lac objects. Only two samples
   are too small to mention a general property. Recently ROSAT has found
   another z > 4 bright RLQ, RX J1028.6-0844 which has abnormal flat
   spectrum (photon index = - 0.7 in ROSAT band). It is just a role of
   ASCA to observe this peculiar z = 4.3 RLQ in order to understand the
   evolution of AGN.
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