Citrus sudachi is a small, round, green citrus fruit of Japanese origin that is a specialty of Tokushima Prefecture in Japan. It is a sour citrus, not eaten as fruit, but used as food flavoring in place of lemon or lime.
It likes 1/2 day to full sun and well drained soil. If growing it in a pot, in the winter place your plant in a well-lit room. Potting soil should be coarse, acidic, and well-drained.