The Citrus sudachi tree is a small, hardy citrus plant native to Japan, known for its fragrant blossoms and compact size. It produces small, round green fruits called sudachi, which are tart and highly aromatic. Sudachi fruits are often used in Japanese cuisine as a souring agent, similar to lemons or limes. The tree thrives in temperate climates, prefers well-drained soil, and can tolerate colder temperatures compared to other citrus trees, making it a popular choice for cultivation in cooler regions.