What is "iyokan"

n. A citrus fruit from Japan, with a more bitter taste than an orange, (taxlink Citrus × iyo nothospecies noshow=1).

The iyokan (伊予柑 - C. × iyo), also known as anadomikan (穴門みかん) and Gokaku no Iyokan, is a Japanese citrus fruit, similar in appearance to a mandarin orange. It is the second most widely produced citrus fruit in Japan after the satsuma mandarin.

Iyokan was discovered in Yamaguchi Prefecture during the Meiji era. Nowadays it mostly grows in Ehime Prefecture. Iyokan are named after Ehime Prefecture which was once called "Iyo-koku" (Iyo-country).