Shonan Gold instance of cultivar
History
Shōnan gold was first cultivated in 1988, by hybrid crossing the  Citrus flaviculpus (Ōgonkan (黄金柑, "Golden Orange")) with  Citrus unshiu cv. Imamura unshiu (今村温州) (a variety of Satsuma orange). It is thought to be a nucellar seedling of the mother plant Ōgonkan.The cultivation was first conducted at the Kanagawa Agricultural Research Institute, Nebukawa Experiment Station (神奈川県農業総合研究所根府川試験場) in the city of Odawara, although the station has since been bureaucratically reorganized as the Nebukawas Sub-Office, under the Ashigara-ku Office, Kanagawa Agricultural Technology Center (神奈川県農業技術センター足柄地区事務所根府川分室). Further seed selection and propagation was continued until the 12th year (1999) to establish stability of characteristics. The hybrid was registered with the name "Shōnan Gold" (registration number 11469) at Japan's Ministry of Agriculture, Forestry and Fisheries (MAFF) in 2003, and the first harvest took place that same year. Shipment started in 2006 (FY2005) with about 2.0 metric tons officially entering the market, or about 450 kg according to a newspaper coverage.
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