Tokyo, a man called Mao Sugiyama had his penis and testicles surgically removed in March and kept them frozen for two months before cooking them at a public event in May.
Each portion was sold for 20,000 yen ($250).
Tokyo police have commenced investigation to ascertain whether the man who cooked his own severed genitals and served them to five paying diners committed a crime.
Some residents of Suginami have expressed a sense of discomfort even as the mayor of Suginami ward, the Tokyo district where the event took place, is of the view it involves the display of obscene objects.
Sugiyama, a painter in his 20s who defines himself as “asexual”, said it was organised to raise awareness about “sexual minorities, x-gender, asexual people”.