Maybe you already know this, but John Stevens has published tapes of KOTODAMA.
Some people you may wish to contact off line about this are Koichi Barrish, a Shinto priest, Fred Little (who discusses it in an aikido faq floating around the net somewhere, William Gleason (who has discussed it in his book), and George Ledyard, who, judging by private correspondence, knows quite a bit about it.
Would like to hear what you come up with. Good luck.
Don J. Modesto
Ft. Lauderdale, Florida
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http://theaikidodojo.com/