Heat the oven to 375 degrees F and arrange a rack in the middle.
Toss 2 cups pumpkin seeds with 2 teaspoons vegetable oil.
Roast on a baking sheet, stirring every 5 minutes, until seeds are aromatic, crisp, and browned, about 10 to 15 minutes.
While the seeds are still warm, sprinkle 1 teaspoon wasabi powder, 3/4 teaspoon ground coriander, and 2 teaspoons kosher salt over them and toss to combine.