Mix soy sauce and sake in a plastic bag. Cut octopus in a bite size and add into the plastic bag. Marinate for 10 mins ~ over night.

Take marinated octopus out of the plastic bag and remove as much as liquid. Mix potato starch and flour in a separate plastic bag. Add octopus and coat them evenly.

Add canola oil in a pod as required and fry them until outside is crispy.