The deadly Tiger Fugu (Pufferfish) is renown for its excellent sushi and liver...with one Caveat...if the chef is slightly im-precise in cleaning it...you will expire after one bite. There is no known antidote.
Cheers, DPW [ Everything has limitations...and I hate limitations.]
Japan's greatest Kabucki theater actor died suddenly from eating one too many Tiger Fugu livers!
It think the liver is one of the organs that is off limits. The stories I've heard about it is the poisoning occurs when the chef accidentally nicks the liver, and poisons the rest of the meat.
Either way, I'll pass. Raw fish is not to die for.