Shingen Takeda was lord of Kai and Gama's allied.

Kacchu no Senshi Gamu

He keeps in contact with Gama via his subordinate, Yamamoto Kansuke. As he is informed that Nobunaga Oda has the ganins of the Kagero clan on his side, he sends news to Gama not to underestimate the warlord and to finish off the ganin at once.