Read more: Red And Green Flags To Look For When Buying Produce At The Store Sumo is actually the brand name for the shiranui citrus, or Dekopon (another brand name), as it's marketed in Japan ...

Sumo citrus or Sumo Mandarins is a funny-looking fruit that originated in Japan in the 1970s and earned the nickname "dekopon" thanks to the signature "top knot" on each piece of fruit.