In Japan, it is officially known as the kawano natsu daidai (カワノナツダイダイ（川野夏橙）?), but also colloquially the amanatsu, amanatsu daidai (甘夏橙), amanatsukan (甘夏柑), and amanatsu mikan (甘夏蜜柑（甘夏みかん）).
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.
The natsumikan tree is believed to be genetically derived from the pomelo (Citrus grandis or Citrus maxima).
- Citrus kawanonatsudaidai.jpg
The large bearing tree.Citrus-natsudaidai.jpg
Locally at Nagato, Yamaguchi.Gardens with natsumikans in hagi.jpg
At street side in Hagi, Yamaguchi.Amanatsu trees on Nokonoshima Island.JPGCitrus natsudaidai Melanose.jpg
On tree.Kusune Citrus natsudaidai.JPG
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