Groups of wild yukkuri families living together to increase their own survival rates. Often lead by a leader, either a dosuyukkuri, a strong marisa, or a wise patchouli.
Lots of clans perform a punishment or culling system to dispose of yukkuri's they deem uneasy The effectiveness of this system varies per clan. Some clans dispose of shitheads since a single shithead yukkuri can get an entire clan killed, while others mistakenly dispose voice of reasons (usually patchys) and got themselves killed by not listening to it.
