For 450 years, the little-known Ryukyu Kingdom thrived in what is now Japan. Now, after nearly vanishing, its unique fusion cuisine is being revived.

"You can learn a lot about a person by looking at their tongue," Yukie Miyaguni tells me in the kitchen-classroom of her second-storey apartment in Uruma, a city on the Japanese island of Okinawa. I've taken a few cooking classes over the years, but this is the first time anyone's ever asked to examine my tongue.

With my mouth agape, Miyaguni – a Traditional Chinese Medicine (TCM) practitioner and Ryukyuan chef – gives my tongue a long look before drawing its likeness on a whiteboard and offering a prescription: "More cacao at night, honey in the........

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