|Natsumikan / Amanatsu|
C. × natsudaidai
|Citrus × natsudaidai|
In Japan, it is known as kawano natsu daidai ((?)), but also colloquially the amanatsu, amanatsu daidai (), amanatsukan (), and amanatsu mikan (?()).
Natsumikan is about the size of grapefruit and oblate in shape. The fruit contains 12 segments and about 30 seeds. The rough textured fruit is easy to peel and is commonly eaten fresh. It is also used for wide variety of products ranging from marmalades to alcoholic beverages.
Natsumikan is grown commercially in Japan, notably in Yamaguchi, Kumamoto and Ehime prefecture. The city of Hagi is famous for its natsumikans, particularly when used in natsumikan juice and ice cream.
Yamaguchi Prefecture takes such pride in their natsumikan industry that the typically white crash barriers of Japan were changed to a befitting orange.
The natsumikan tree is believed to be genetically derived from the pomelo (Citrus grandis or Citrus maxima).