A seed syllable is a letterform used solely for
meditation and is a part of esoteric Buddhism practiced in China and Japan. Its Sanskrit origins can be traced back to the seed syllable
hrih.hrih.The kiriku calls upon the energy of Amida Nyorai. Amida Nyorai is the main
deity in Pure Land Buddhism.
Symbol 2 in the system of
Reiki appears to be derived from the kiriku.