- Preheat oven to 250ºF and line a large baking sheet with parchment paper.
- Add oil to a deep pot and heat over medium-low heat. Once oil is very hot, add popcorn kernels. When kernels begin to pop, cover, and shake vigorously to evenly pop popcorn. Remove from heat once popcorn has popped, 1-2 minutes. Transfer to a large mixing bowl.
- Heat Takumi sauce, coconut milk and brown sugar in a saucepan over low heat. Bring to a boil and continue to cook, whisking occasionally until mixture has reduced by half and is starting to become stretchy, but still able to be stirred, 10-15 minutes. Whisk in baking soda. Turn heat off and pour mixture over popcorn as you stir to coat popcorn.
- Spread on a parchment paper lined baking sheet. Bake for 30-45 minutes, stirring popcorn every 15 minutes. Cool popcorn completely at room temperature before enjoying.