Four hundred years ago kunenbo used to be one of the most popular citrus fruit varieties in Japan, but it was later surpassed by unshiu mikan (Satsuma) , which actually came about from a hybrid between kishu and kunenbo. Satsuma probably inherits its cold hardiness and aroma from kunenbo. Tree is vigorous, cold resistant & hardy as Satsuma, average weight 120 gms, leaves large, rind 3-5 mm, petioles slightly winged, approx 15-20 seeds, polyembryonic. Large fruit with very thick rind, flavor only fair, lots of rag. It grows to 3m in height. White flowers bloom at the ends of the branches in early summer. The fruit is about 6cm in diameter and ripens to orange in the fall. From a Japanese blog: "Apparently, the downside of Kunenbo is that the skin is thick and has a turpentine scent, but I didn't particularly mind the oily smell. On the contrary, the scent, which is a mix of sour and sweet, is refreshing, and I thought it would be good for flavoring something. It was sweet and flavorful, with just the right amount of sourness, and above all, it was incredibly juicy and delicious."