Setoka (せとか,Setoka)[1] is aseedless and highly sweetJapanesecitrus fruit that is atangor, ahybrid of theMurcott tangor with "Kuchinotsu No.37",[2] which in turn is a hybrid of theKiyomi tangor and aKing tangor/Willowleaf mandarin cross, "Encore No. 2".[3][4] It was registered as "Tangor Nōrin No.8"[5] in 1998 and as "Variety registration No.9398" under the Plant Variety Protection and Seed Act[6] in 2001.[4] It weighs 200–280 g (7.1–9.9 oz) and has an oblate shape. The rind is thin and easily peelable. Its flavor is pleasant, aromatic, and similar to the Murcott. The fruit ripens in February. Its sugar level is very high at 12–13 °Bx whereas its citric acid is low (0.8–1.0%).[4]
In South Korea, Setoka is calledCheonhyehyang (Korean:천혜향, 天惠香).[7] Starting from 2000s, Cheonhyehyang has been farmed in the warmJeju island.[8] From mid-2010s however,global warming has allowed Cheonhyehyang to be cultivated as North as theNorth Chungcheong province.[9]
