Futomani

 is a traditional Shinto system of divination. Practitioners attempt to foresee future events by interpreting the pattern of cracks made by heating the shoulder-blade of a stag. The practice is thought to predate the introduction of divination by tortoiseshell, which was imported from China; archaeological evidence suggests it originated as early as the Jōmon period. 
The "kami" most commonly associated with "futomani" is Uraniwa no Kami.
"Futomani" is still practiced at the Shinto shrine on Mount Mitake as an annual event. 
In aikido, "futomani" is considered an important adjunct to "kotodama" practice.