Tokyo-X is a Japanese breed of

domestic pig The pig (''Sus domesticus''), often called swine, hog, or domestic pig when distinguishing from other members of the genus '' Sus'', is an omnivorous, domesticated, even-toed, hoofed mammal. It is variously considered a subspecies of ''Sus s ...

, bred for high quality

pork Pork is the culinary name for the meat of the domestic pig (''Sus domesticus''). It is the most commonly consumed meat worldwide, with evidence of pig husbandry dating back to 5000 BCE. Pork is eaten both freshly cooked and preserved; ...

production. It is unusual for its

marbled meat Marbled meat is meat, especially red meat, that contains various amounts of intramuscular fat, giving it an appearance similar to marble. Important terms defined ''Beef quality grades'' - A quality grade is a composite evaluation of factors t ...

, seldom seen in pork. The Tokyo-X breeding effort was begun in 1990 by the Tokyo Metropolitan Livestock Experiment Station, combining bloodlines from the Duroc (USA),

Berkshire Berkshire ( ; in the 17th century sometimes spelt phonetically as Barkeshire; abbreviated Berks.) is a historic county in South East England. One of the home counties, Berkshire was recognised by Queen Elizabeth II as the Royal County of Berk ...

(UK), and

Beijing Black The Beijing Black, also known as the Peking Black, is a breed of domestic pig from China. They are mostly black, but have some white markings. The breed was created in 1962 by cross-breeding a Berkshire with a common Chinese pig. Two other breeds, ...

(China) breeds. Five generations of breeding and selection ended in 1997 when the breed went to market. Tokyo-X was also featured on the Japanese television program ''

Iron Chef is a Japanese television cooking show produced by Fuji Television. The series, which premiered on October 10, 1993, was a stylized cook-off featuring guest chefs challenging one of the show's resident "Iron Chefs" in a timed cooking battle bui ...

'', where the cooks had to use it as an ingredient in each of their dishes.

References

Pig breeds originating in Japan {{Pig-stub