Ten Families War

The Ten Families War is a conflict between the Ochida Clan and nine other clans within Tokoyonokuni. It is the bloodiest battle in the history of Tokoyonokuni.

Cause
There was an unsteady peace between the ten clans. All wanted to seize control of the Shikokukasho, an area of Tokoyonokuni which holds legends of a godly power given to those who are able to claim it. Due to this, none of the clans took action to obtain this power in fear of the other clans violently opposing them. That is, until the Umeki attacked the Yasui village of Arumaki. This incurred the mobilization of all the other clans' military personnel.