Fan instruction is rather rare.
From the Japanese fan it might be a subsidiary instruction within some kendo styles.
From the Chinese my friend, Ernest Rothrock, in Pittsburgh does teach fan.I know he does several Chinese fan forms. The are extremely comples, including fan flips, snapping and closing movements as well as thrusts, parries, etc.
His fan techniques demand you're quite advanced in his Chinese traditions before you're capable of learning the movements. You need the other traditions to build upon.
bushi no te isshinryu
offering free instruction for 30 years