Kanji are Japanese written characters.
Mudra is a Sanskrit word and represents the stimulating of specific energy through body postures and hand movements.
Kanji Hand Mudras were introduced to the system of
Reiki in an Omega Dawn Sanctuary of
Healing Arts manual in 1983 from the branch Raku Kei
Reiki,Reiki, according to Robert Fueston. That manual was created by Arthur Robertson.