There are few families in the Empire as diverse and ambitious as the Yoritomo, so it is no surprise the family supports a small number of shugenja. The tradition stems back to the earliest day of the Mantis Clan. Kaimetsu-Uo, the clan's founder, had no capacity to speak to the kami, but one of his daughters did and she married a ronin who possessed the same ability. Thus began a branch of the Yoritomo family that possesses an unparalleled ability to commune with the spirits of the sea and storm.
For centuries, the small number of Yoritomo shugenja have maintained an inexplicably powerful link to the spirits of the sea and to a lesser extent the spirits of wind and storms. The Moshi have proven more capable in the latter since their induction into the clan, but no shugenja in the Empire is at home on the seas as one from the Yoritomo family. The school maintains a number of small temples throughout the Mantis islands, but none are as well known as the infamous Tempest Island, a small island renowned for the battering it receives during storm season. It is here the most powerful among the Yoritomo hone their skills and power, making themselves a force to be reckoned with throughout the whole of Rokugan.