  We have searched for solar hidden photons in the eV energy range using a
dedicated hidden photon detector. The detector consisted of a parabolic mirror
with a diameter of 500mm and a focal length of 1007mm installed in a vacuum
chamber, and a photomultiplier tube at its focal point. The detector was
attached to the Tokyo axion helioscope, Sumico which has a mechanism to track
the sun. From the result of the measurement, we found no evidence for the
existence of hidden photons and set a limit on the photon-hidden photon mixing
parameter \chi depending on the hidden photon mass m_{\gamma '}.
