Sansho pepper is a spice derived from the dried fruit of the Zanthoxylum plant, commonly found in East Asia. It has a unique flavor profile that combines citrusy notes with a mild heat, making it a popular ingredient in Japanese cuisine, particularly in dishes like soba and yakitori. The spice is often used in its ground form, known as sansho, and is valued for its aromatic qualities. It is also known for its numbing sensation on the palate, similar to that of Sichuan pepper, which enhances the overall taste experience in various dishes.