At the Bunroku-Keicho War (1592 to 1598), Fujimasa's master, Sadatsugu departed for the front and Fujimasa played the role of 'rusuiyaku' (a person representing the master during his absence).
文禄・慶長の役（1592年-1598年）において、主君定次が出陣し、藤政は留守居役を務めた。