In Tokyo, Japan, police are investigating Mao Sugiyama, who cooked his own severed genitals and served them to five paying diners.
In March, Sugiyama had his penis and testicles surgically removed, and kept them frozen for two months before cooking them at a public event in May, reports the AFP.
Diners reportedly each paid 20,000 yen [$250] for a portion.
A Tokyo police spokeswoman said there was "an ongoing investigation" into the incident.
Sugiyama, a painter in his 20s who defines himself as "asexual," did not respond to requests from the press for comment.
In an email to AFP in May, Sugiyama confirmed the event had taken place and said it was organised to raise awareness about "sexual minorities, x-gender, asexual people."
In tweets on May 18, Sugiyama said steps were taken so his act met all relevant laws, including a ban on organ sales, processing of medical waste and food sanitation requirements.