Pour 3 tablespoons of vegetable oil and 1/3 cup popcorn kernels into a 3-quart or larger pan with a lid.
Cover the pan and set the heat to medium-high. Shake the pan gently to keep the kernels moving and allow steam to escape. Remove from heat once the popping stops and transfer to a large bowl.
In a small bowl, whisk together the remaining 3 tablespoons of oil along with the wasabi, ginger, and salt. Drizzle over the warm popcorn and toss well to coat.
Notes
To store your leftovers, place popcorn in an airtight container at room temperature. It will stay fresh and crunchy for up to 1-2 days.If needed, you can reheat it in the oven at 250°F (120°C) for about 5-7 minutes to restore its crispness. Avoid using the microwave, as it may make the popcorn chewy.