This Satsuma selection is characterized by its large, seedless fruit and yellow-orange skin that is both easy to peel and segment. The fruit is typically harvested in the fall, while Citrus mandarin ‘Okitsu’ produces white flowers during the summer months. Additionally, Citrus mandarin ‘Okitsu’ is self-fertile, making it a reliable option for growers. Citrus mandarin is evergreen and native to China, Japan, and Vietnam. Learn more about Citrus mandarin. Citrus mandarin ‘Okitsu’ originated as a seedling of Citrus mandarin ‘Miyagawa’ during a controlled pollination by M. Kajiura and T. Iwasaki at the Horticultural Research Station in Okitsu, Japan. Citrus mandarin ‘Okitsu’ was distributed for trial in 1953, registered in 1963, and introduced into Europe in 1983.