The pork in the name is canned luncheon meat, which Okinawans simply call pork.
A slice of fried luncheon meat and egg are sandwiched in rice and wrapped in nori, made fresh to order at takeaway shops such as the one near Naha's Makishi Public Market and eaten on the go.
Takoyaki (Octopus Balls)
Yakitori (Skewered Chicken)
Sapporo Miso Ramen