Japanese citrus

A number of citrus fruits are grown in or strongly associated with Japan. Many of these fruits are of Chinese origin, but have been modified or specially bred for cultivation in Japan.

A yuzu fruit
A Shonan Gold fruit

Japanese taxonomy
Main article: Citrus taxonomy

Japan usually follows the botanical names of the taxonomy from Tyôzaburô Tanaka, often referred to as the "Tanaka system", giving for each cultivar a separate name no matter if it is pure or a hybrid of two or more species or varieties. While elsewhere it is more popular to classify the genus citrus into species, and further into varieties, and then into cultivars or hybrid. Such a system was created by Walter Tennyson Swingle from Florida and is called the "Swingle system".[1] The different approaches of the two systems lead to partially-overlapping or nested 'species', for example, Citrus unshiu and Citrus tangerina (Tanaka) versus Citrus reticulata (Swingle). Likewise, common terms, like "mikan", do not always align with these taxonomic groups.

Japanese citrus (partial list)

Japanese citrus fruits include the following:

Common
name(s)		 Image Taxonomic
name/constituents		 Notes
Amanatsu Citrus x natsudaidai Yellowish-orange in colour, about the size of grapefruit and oblate in shape. The fruit contains 12 segments and about 30 seeds.
Banpeiyu (pomelo cultivar) Citrus maxima
Bushukan (Buddha's hand) Citrus medica var. sarcodactylis
Daidai Citrus × daidai
Dekopon Citrus unshiu x sinensis x C. poonensis
Haruka Citrus tamurana x natsudaidai
Hassaku orange Citrus x hassaku
Hyuganatsu Citrus tamurana
Iyokan Citrus x iyo
Jabara Citrus x jabara
Kabosu Citrus sphaerocarpa
Karatachi (Japanese bitter orange) Citrus trifoliata
Kanpei Citrus x natsudaidai
Kawachi Bankan (Mishokan) Citrus kawachiensis
Kinkan (Kumquat) Citrus japonica
Kinkoji unshiu Citrus obovoidea x unshiu
Kishu Citrus kinokuni
Kiyomi Citrus unshiu x sinensis
Kobayashi mikan Citrus natsudaidai x unshiu
Koji orange Citrus leiocarpa
Kuchinotsu No.37 Kiyomi x encore
Mikan Citrus unshiu
Ōgonkan Citrus flaviculpus
Ponkan (Tangerine) Citrus poonensis
Reikou
Sakurajima komikan (mandarin orange cultivar), Citrus x sinensis
Sanbokan Citrus sulcata
Shonan gold Citrus flaviculpus x Citrus unshiu
Shikuwasa (Shiikwaasaa, Shequasar, Hirami lemon) Citrus x depressa
Sudachi Citrus sudachi
Tachibana Citrus tachibana or Citrus reticulata var. tachibana
Tankan Citrus poonensis × Citrus sinensis
Yukou Citrus yuko
Yuzu Citrus junos

[2]

References
  1. Citrus Genetics... Iqrar A. Khan
  2. Green, Aliza. (2004) Quirk Books. Field Guide to Produce: How to Identify, Select, and Prepare Virtually Every Fruit and Vegetable at the Market. Page 109. ISBN 1-931686-80-7
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