Bring 5 cups of water and tapioca pearls to a boil.
Boil for 15 minutes, until the bubbles are soft and tender.
Leave in the cooking liquid for 5 minutes.
Meanwhile, let's make the simple syrup.
Combine brown sugar, white sugar and 2 cups water in a saucepan.
Bring to a boil. Boil for about 15 minutes, until a thin syrup consistency. Leave to cool.
Strain tapioca and add the tapioca to the simple syrup. Let it rest for 30 minutes.
In a small saucepan, combine tea, ginger and 3/4 cup water. Bring to a boil. Boil for 3 minutes. Leave to rest for 5 minutes.
Strain tea and add 5 ice cubes.
In a blender, combine, tea and ice, coconut milk and pineapple. Blend until thick and frothy.
Divide the tapioca and the simple syrup evenly between 3 glasses.
Pour the pineapple coconut combo evenly into the 3 glasses.
Shake well and serve.