Breakup Reactions have been experimentally investigated for the one neutron halo nucleus 11Be and the two neutron halo nucleus 11Li at about 70 MeV/nucleon at RIKEN. We here focus on the breakup with a Pb target, where the Coulomb breakup is dominant over nuclear breakup, and its soft E1 excitation has been a central issue. For 11Be, we present the energy spectra analyzed with the inelastic scattering angle. The selection at very forward angles has been used to extract the E1 strength, which is then applied to obtain the spectroscopic factor of the halo ground state. For 11Li, we have observed significant E1 strength at very low relative energies, which were missing in the previous measurements.