Amanatsu
The original natsu mikan that served as the basis for amanatsu was found in Yamaguchi Prefecture around 1700.The rough textured fruit is easy to peel and is commonly eaten fresh.[citation needed] Natsumikan is grown commercially in Japan, notably in Yamaguchi, Kumamoto and Ehime prefecture.[citation needed] Yamaguchi Prefecture takes such pride in their natsumikan industry that the typically white crash barriers of Japan were changed to a befitting orange.[citation needed] Researchers found that immature natsumikan peel is beneficial for the treatment of chronic allergic dermatitis in mice.