Strife can be removed in many different ways. The section on "Removing Strife" on page 29 lists ninjos, passions, tea ceremonies, and meditation. The first three give specific values from the amount of strife to remove, and under what conditions. I am not finding similar specifics for meditation. Am I failing to find the text? If not...
I assume this is a downtime activity, requiring at least a few hours. Would you roll a meditation check to remove strife, with TN and results similar to a tea ceremony ritual?
But I'm probably just failing to find the text.