Kama toro is a very extremely marbled piece of toro, from the neck of the Bluefin tuna. If you are going to filter a tuna, it is advisable to remove the neck first. The neck, better known in Japanese as Kama, is a piece of waste for many, but that is unfair. The neckpiece houses a small piece of tasty lean red meat, also called secret and can be found under the side fin. The lower marbled part also has a piece of toro. This marbled piece of toro is small but very tasteful.