Hanbei Takenaka served as a strategist for Hideyoshi.

Spoiler

He died due to illness during Hideyoshi's attack on the Mōri in the Chūgoku region of Japan, while Miki Castle was being besieged. In the plotline of Sengoku Basara, he suffers from the disease Tuberculosis.

(Sources: Wikipedia, Part of the introduction to Bliss' scanlations of Sengoku Basara 2)