To search for planets around intermediate-mass stars, evolved giant
stars are the most suitable targets for Doppler spectroscopy-based
planet searches because these stars have low surface activity and
their spectra exhibit many sharp absorption lines. In recent years the
number of planets found orbiting such evolved stars has dramatically
increased and some properties of planetary systems have begun to
emerge, although the number is still quite small compared with planets
detected around solar-type dwarf stars. Now, we are carrying out a
Korean-Japanese planet search program since 2005 and have just started
a survey program of massive intermediate-mass giant stars in 2010. The
aim of the programs is to show the statistical properties of planetary
systems around intermediate-mass stars by precise radial velocity
surveys of evolved GK-type giant stars together with collaborative
surveys of the East-Asian Planet Search Network. In my talk, I
introduce our planet searches and present current understandings of
planets around evolved intermediate-mass stars.