Kiko is a Japanese Mikkyo practice of movement, postures, and sounds to bring one into alignment with all that is.
Kiko is said to be an indigenous practice from the Japanese Archipelago. And I believe this is true; there are many exercises in it that I have not seen anywhere else. But I think that it is equally true that much of what is done has traveled to Japan with many practices obviously coming from Yoga, Tai Chi, and Qi Gong. In fact, today in the exoteric schools of Kiko, what I see looks just like what I think Qi Gong looks like. In our esoteric practice, however, there are many more 'older' and 'natural' pieces, that I do not see in Qi Gong, Tai Chi, or Yoga.