The Natsume Family

Among the Big Eight of Japanese Kendo, the Ito family was a tad special. 

This special characteristic was, of course, regarding the fact that the Ito family was not welcome among the ranks of the other Kendo families. This was an undeniable truth, as the Ito family would rely on their Ito Replication Style to observe the Kendo techniques of the other families when they were free, invoking dissatisfaction in the other families. Therefore, any sane person who valued their privacy would not be fond of them. 

Even so, the Ito family was not completely ostracized. This was probably because the Ito Imitation technique itself required one to be extremely gifted in Kendo, possess astounding observational skills, and a flexible way of thinking.