Shingyōtō-ryū (心形刀流 ) is a Japanese koryū swordsmanship style founded in 1682 by Iba Josuiken Hideaki (伊庭是水軒秀明 ). The name roughly translates as "mind shape/form sword school". The style places a high emphasis on swordsmanship philosophy, mainly to-ho-no-sho-shin or "the heart of the sword".
Skoss, Diane (Editor). 1997. Koryu Bujutsu.Classical Warrior Traditions of Japan, volume 1. New Jersey, Koryu Books. ISBN 1-890536-04-0