Press the firm tofu between paper towels to remove excess moisture and slice into long, thin strips.
In a small bowl, whisk together the tamari, rice vinegar, ginger powder, and garlic powder.
Marinate the tofu strips in the tamari mixture for 5 minutes, then lightly sear in a non-stick skillet until the edges are golden.
Pulse the shelled edamame and hemp seeds in a food processor until they reach a crumbly, rice-like texture.
Place one nori sheet on a bamboo rolling mat and spread one-third of the edamame-hemp mixture over the bottom two-thirds of the sheet.
Arrange a portion of the tofu, cucumber, bell pepper, carrots, and cabbage in a horizontal line across the center of the edamame mixture.
Use the mat to roll the sushi tightly away from you, dabbing the top edge of the nori with water to seal.
Repeat with the remaining ingredients and slice each roll into six to eight pieces using a sharp, wet knife.